CN107274597A - POS Method of printing and its system based on LAN - Google Patents
POS Method of printing and its system based on LAN Download PDFInfo
- Publication number
- CN107274597A CN107274597A CN201710455882.4A CN201710455882A CN107274597A CN 107274597 A CN107274597 A CN 107274597A CN 201710455882 A CN201710455882 A CN 201710455882A CN 107274597 A CN107274597 A CN 107274597A
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- Prior art keywords
- service end
- information
- pos terminal
- file
- printed
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Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07G—REGISTERING THE RECEIPT OF CASH, VALUABLES, OR TOKENS
- G07G1/00—Cash registers
- G07G1/0018—Constructional details, e.g. of drawer, printing means, input means
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1202—Dedicated interfaces to print systems specifically adapted to achieve a particular effect
- G06F3/1203—Improving or facilitating administration, e.g. print management
- G06F3/1209—Improving or facilitating administration, e.g. print management resulting in adapted or bridged legacy communication protocols, e.g. emulation, protocol extension
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1223—Dedicated interfaces to print systems specifically adapted to use a particular technique
- G06F3/1236—Connection management
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1278—Dedicated interfaces to print systems specifically adapted to adopt a particular infrastructure
- G06F3/1285—Remote printer device, e.g. being remote from client or server
- G06F3/1286—Remote printer device, e.g. being remote from client or server via local network
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07G—REGISTERING THE RECEIPT OF CASH, VALUABLES, OR TOKENS
- G07G1/00—Cash registers
- G07G1/12—Cash registers electronically operated
- G07G1/14—Systems including one or more distant stations co-operating with a central processing unit
Abstract
The invention discloses a kind of POS Method of printing based on LAN and its system, method includes：POS terminal is set up with the service end in same LAN and communicated to connect, and obtains the first Printer Information of service end；POS terminal selects the second obtained Printer Information to be encrypted and send to service end by mimeograph documents information, print parameters and from the first Printer Information；Service end decryption obtains mimeograph documents information, print parameters and the second Printer Information；File to be printed is encrypted and is uploaded to service end by POS terminal；Service end decryption obtains file to be printed, and according to mimeograph documents Information Authentication file to be printed；If being verified, service end prints the file to be printed according to print parameters and the second Printer Information.Data are encrypted in information interactive process by being interacted with the service end in same LAN with mounted printer on shared service end for POS terminal, it is ensured that the security of data transfer.
Description
Technical field
The present invention relates to printing technique field, more particularly to a kind of POS Method of printing and its system based on LAN.
Background technology
With the development and popularization of smart machine, needed in more and more office scene using in intelligent POS terminal
Data or file and printed, if desired for files such as the picture in intelligent POS, word documents, or transaction document etc..
If there is the driving for installing corresponding printer directly to print just good on smart machine, but current printer manufacturer base
The printer driver of adaptation smart machine is not developed in sheet, therefore is typically all that the file of intelligent POS terminal is passed through into data
Line or using the software copy with file wireless transmission function on the PC for having installed printer, then pass through operation again
PC is printed, but aforesaid way brings very big inconvenience to user.
The content of the invention
The technical problems to be solved by the invention are：A kind of POS Method of printing and its system based on LAN are provided,
Convenient intelligence POS is printed.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of POS printing based on LAN
Method, including：
POS terminal is set up with the service end in same LAN and communicated to connect, and obtains the first printing of the service end
Machine information；
Print request is encrypted POS terminal, obtains the first encryption information, and first encryption information is sent to institute
Service end is stated, the print request is believed including mimeograph documents information, print parameters and the POS terminal from first printer
The second obtained Printer Information is selected in breath；
Service end decrypts first encryption information, obtains mimeograph documents information, print parameters and the second Printer Information；
File to be printed is encrypted POS terminal, obtains the second encryption information, and second encryption information is uploaded to
Service end；
Service end decrypts second encryption information, obtains file to be printed, and according to the mimeograph documents Information Authentication
The file to be printed；
If being verified, service end prints the file to be printed according to print parameters and the second Printer Information.
The invention further relates to a kind of POS print system based on LAN, including POS terminal and service end, the POS terminal
Including first memory and first processor, the service end includes second memory and second processor；
The first memory has program stored therein, and is configured to perform following steps by the first processor：
POS terminal is set up with the service end in same LAN and communicated to connect, and obtains the first printing of the service end
Machine information；
Print request is encrypted POS terminal, obtains the first encryption information, and first encryption information is sent to institute
Service end is stated, the print request is believed including mimeograph documents information, print parameters and the POS terminal from first printer
The second obtained Printer Information is selected in breath；
File to be printed is encrypted POS terminal, obtains the second encryption information, and second encryption information is uploaded to
Service end；
The second memory has program stored therein, and is configured to perform following steps by the second processor：
Service end decrypts first encryption information, obtains mimeograph documents information, print parameters and the second Printer Information；
Service end decrypts second encryption information, obtains file to be printed, and according to the mimeograph documents Information Authentication
The file to be printed；
If being verified, service end prints the file to be printed according to print parameters and the second Printer Information.
The beneficial effects of the present invention are：Interacted by the communication of LAN, you can realize that intelligent POS terminal is shared and use
The mounted printer of service end so that printer is fully utilized；By entering during interaction is communicated to data
Row encryption, it is ensured that the security of data transfer；Set by carrying out file, printer selection in intelligent POS terminal with print parameters
Put, without carrying out other operations in service end, just file to be printed can be automatically transferred to service end and be beaten automatically
Print, it is ensured that while data safety so that simple and convenient, greatly facilitate the printing of intelligent POS.
Brief description of the drawings
Fig. 1 is a kind of flow chart of the POS Method of printing based on LAN of the present invention；
Fig. 2 is the method flow diagram of the embodiment of the present invention one.
Embodiment
To describe technology contents, the objects and the effects of the present invention in detail, below in conjunction with embodiment and coordinate attached
Figure is explained in detail.
The design of most critical of the present invention is：POS terminal with the PC ends in same LAN by interacting, to share PC
Mounted printer on end, while being encrypted in information interactive process to data, it is ensured that the security of data transfer.
Referring to Fig. 1, a kind of POS Method of printing based on LAN, including：
POS terminal is set up with the service end in same LAN and communicated to connect, and obtains the first printing of the service end
Machine information；
Print request is encrypted POS terminal, obtains the first encryption information, and first encryption information is sent to institute
Service end is stated, the print request is believed including mimeograph documents information, print parameters and the POS terminal from first printer
The second obtained Printer Information is selected in breath；
Service end decrypts first encryption information, obtains mimeograph documents information, print parameters and the second Printer Information；
File to be printed is encrypted POS terminal, obtains the second encryption information, and second encryption information is uploaded to
Service end；
Service end decrypts second encryption information, obtains file to be printed, and according to the mimeograph documents Information Authentication
The file to be printed；
If being verified, service end prints the file to be printed according to print parameters and the second Printer Information.
It was found from foregoing description, the beneficial effects of the present invention are：Interacted by the communication of LAN, realize intelligence POS
Collaborative share uses the mounted printer of service end, the printing of convenient intelligence POS.
It is further, described that " POS terminal is set up with the service end in same LAN and communicated to connect, and obtains the clothes
Be engaged in end the first Printer Information " be specially：
POS terminal sends broadcast request in LAN；
Service end is received after the broadcast request of POS terminal, by the IP address of the machine, TCP port information and mounted
First Printer Information is encrypted, and obtains the 3rd encryption information, and the 3rd encryption information is back into POS terminal；
POS terminal decrypts the 3rd encryption information, obtains the IP address, TCP port information and the first printing of service end
Machine information；
POS terminal is set up TCP communication with the service end by the IP address and TCP port information of the service end and is connected.
Seen from the above description, POS terminal is set up TCP communication by Local network communication and service end and is connected, convenient follow-up
The transmission of print request and file to be printed, and ensure the reliability of transmission.
Further, the mimeograph documents information includes the file size of file to be printed；
" file to be printed according to the mimeograph documents Information Authentication " is specially：
Service end judges that the file size for the file to be printed that decryption is obtained is with the file size in mimeograph documents information
It is no consistent；
If so, then decision verification passes through.
Seen from the above description, judge whether file to be printed uploads success by file size, it is ensured that file to be printed
Integrality.
Further, after described " the printing file to be printed ", further comprise：
Print result is fed back to POS terminal by service end；
If file to be printed uploads failure, service end notifies POS terminal to upload file to be printed again.
Seen from the above description, service end is fed back print result, if print unsuccessful, notifies POS terminal again
Send file to be printed, it is ensured that the reliability of printing.
Further, the service end is PC ends.
The present invention also proposes a kind of POS print system based on LAN, including POS terminal and service end, the POS terminal
Including first memory and first processor, the service end includes second memory and second processor；
The first memory has program stored therein, and is configured to perform following steps by the first processor：
POS terminal is set up with the service end in same LAN and communicated to connect, and obtains the first printing of the service end
Machine information；
Print request is encrypted POS terminal, obtains the first encryption information, and first encryption information is sent to institute
Service end is stated, the print request is believed including mimeograph documents information, print parameters and the POS terminal from first printer
The second obtained Printer Information is selected in breath；
File to be printed is encrypted POS terminal, obtains the second encryption information, and second encryption information is uploaded to
Service end；
The second memory has program stored therein, and is configured to perform following steps by the second processor：
Service end decrypts first encryption information, obtains mimeograph documents information, print parameters and the second Printer Information；
Service end decrypts second encryption information, obtains file to be printed, and according to the mimeograph documents Information Authentication
The file to be printed；
If being verified, service end prints the file to be printed according to print parameters and the second Printer Information.
It is further, described that " POS terminal is set up with the service end in same LAN and communicated to connect, and obtains the clothes
Be engaged in end the first Printer Information " be specially：
POS terminal sends broadcast request in LAN；
Service end is received after the broadcast request of POS terminal, by the IP address of the machine, TCP port information and mounted
First Printer Information is encrypted, and obtains the 3rd encryption information, and the 3rd encryption information is back into POS terminal；
POS terminal decrypts the 3rd encryption information, obtains the IP address, TCP port information and the first printing of service end
Machine information；
POS terminal is set up TCP communication with the service end by the IP address and TCP port information of the service end and is connected.
Further, the mimeograph documents information includes the file size of file to be printed；
" file to be printed according to the mimeograph documents Information Authentication " is specially：
Service end judges that the file size for the file to be printed that decryption is obtained is with the file size in mimeograph documents information
It is no consistent；
If so, then decision verification passes through.
Further, after described " the printing file to be printed ", further comprise：
Print result is fed back to POS terminal by service end；
If file to be printed uploads failure, service end notifies POS terminal to upload file to be printed again.
Further, the service end is PC ends.
Embodiment one
Fig. 2 is refer to, embodiments of the invention one are：A kind of POS Method of printing based on LAN, can be applied to not
The intelligent POS of printer driver is installed, methods described comprises the following steps：
S1：POS terminal is set up with the service end in same LAN and communicated to connect, and obtains first dozen of the service end
Print machine information；Specifically, step S1 comprises the following steps：
S101：POS terminal sends broadcast request in LAN；
S102：Service end is received after the broadcast request of POS terminal, by the IP address of the machine, TCP port information and has been pacified
First Printer Information of dress is encrypted, and obtains the 3rd encryption information, and the 3rd encryption information is back into POS terminal；
S103：POS terminal decrypts the 3rd encryption information, obtains IP address, the TCP port information and first of service end
Printer Information；
S104：When POS terminal ready-to-print file, by the IP address and TCP port information of the service end with it is described
Service end sets up TCP communication connection.
Wherein, service end runs UDP service threads and TCP service threads simultaneously, and POS terminal is received by UDP service threads
The broadcast request of transmission, the communication connection request of POS terminal is monitored by TCP service threads；When service end listens to communication connection
After request, open an independent TCP communication thread and set up communication with POS terminal.
S2：Print request is encrypted POS terminal, obtains the first encryption information, and first encryption information is sent
To the service end, the print request includes mimeograph documents information, print parameters and the POS terminal from the described first printing
The second obtained Printer Information is selected in machine information；Wherein, mimeograph documents information includes the file size of file to be printed.
S3：Service end decrypts first encryption information, obtains mimeograph documents information, print parameters and the second printer letter
Breath, and stored.
S4：Service end notifies POS terminal to send file to be printed.
S5：File to be printed is encrypted POS terminal, obtains the second encryption information, and by second encryption information
Reach service end.
S6：Service end decrypts second encryption information, obtains file to be printed.
S7：Service end file to be printed according to the mimeograph documents Information Authentication；Specifically, service end judges decryption
Whether the file size of obtained file to be printed is consistent with the file size in mimeograph documents information, if so, then decision verification
Pass through, perform step S8, if it is not, then decision verification does not pass through, then service end notifies POS terminal to upload file to be printed again, i.e.,
Perform step S4.
S8：Service end prints the file to be printed according to print parameters and the second Printer Information；I.e. service end will
Print parameters and file to be printed all send printer driver interface corresponding to the second Printer Information, are believed by the second printer
Corresponding printer is ceased to be printed.Further, after the completion of printing, print result is fed back to POS terminal by service end.
Further, if file to be printed upload failure (can not when verifying situation about not passing through and printing described above
Situations such as opening file to be printed), then service end notifies POS terminal to upload file to be printed again, that is, performs step S4.
Further, in above-mentioned steps, AES uses symmetric key des encryption algorithm, and symmetric key can be deposited in advance
Storage is into POS terminal and service end.
Preferably, the service end is PC ends.
The present embodiment is interacted by the communication of LAN, is realized that intelligent POS terminal is shared and is beaten using service end is mounted
Print machine so that printer is fully utilized；By the way that data are encrypted during interaction is communicated, it is ensured that data
The security of transmission；Set by carrying out file, printer selection in intelligent POS terminal with print parameters, without in service
End carries out other operations, just file to be printed can be automatically transferred to service end and be printed automatically, it is ensured that data safety
Simultaneously so that simple and convenient；Multiple POSs are also supported while carrying out file transmission and being printed successively, improves and beats
Print efficiency.
Embodiment two
The present embodiment is a kind of POS print system based on LAN of correspondence above-described embodiment, including POS terminal kimonos
Business end, the POS terminal includes first memory and first processor, and the service end includes second memory and second processing
Device；
The first memory has program stored therein, and is configured to perform following steps by the first processor：
POS terminal is set up with the service end in same LAN and communicated to connect, and obtains the first printing of the service end
Machine information；
Print request is encrypted POS terminal, obtains the first encryption information, and first encryption information is sent to institute
Service end is stated, the print request is believed including mimeograph documents information, print parameters and the POS terminal from first printer
The second obtained Printer Information is selected in breath；
File to be printed is encrypted POS terminal, obtains the second encryption information, and second encryption information is uploaded to
Service end；
The second memory has program stored therein, and is configured to perform following steps by the second processor：
Service end decrypts first encryption information, obtains mimeograph documents information, print parameters and the second Printer Information；
Service end decrypts second encryption information, obtains file to be printed, and according to the mimeograph documents Information Authentication
The file to be printed；
If being verified, service end prints the file to be printed according to print parameters and the second Printer Information.
It is further, described that " POS terminal is set up with the service end in same LAN and communicated to connect, and obtains the clothes
Be engaged in end the first Printer Information " be specially：
POS terminal sends broadcast request in LAN；
Service end is received after the broadcast request of POS terminal, by the IP address of the machine, TCP port information and mounted
First Printer Information is encrypted, and obtains the 3rd encryption information, and the 3rd encryption information is back into POS terminal；
POS terminal decrypts the 3rd encryption information, obtains the IP address, TCP port information and the first printing of service end
Machine information；
POS terminal is set up TCP communication with the service end by the IP address and TCP port information of the service end and is connected.
Further, the mimeograph documents information includes the file size of file to be printed；
" file to be printed according to the mimeograph documents Information Authentication " is specially：
Service end judges that the file size for the file to be printed that decryption is obtained is with the file size in mimeograph documents information
It is no consistent；
If so, then decision verification passes through.
Further, after described " the printing file to be printed ", further comprise：
Print result is fed back to POS terminal by service end；
If file to be printed uploads failure, service end notifies POS terminal to upload file to be printed again.
Further, the service end is PC ends.
In summary, the present invention is provided a kind of POS Method of printing and its system based on LAN, pass through LAN
Communication interaction, realize that intelligent POS terminal is shared and use the mounted printer of service end so that printer obtains sufficient profit
With；By the way that data are encrypted during interaction is communicated, it is ensured that the security of data transfer；By in intelligent POS
End progress file, printer selection are set with print parameters, will be to be printed with regard to energy without carrying out other operations in service end
File is automatically transferred to service end and printed automatically, it is ensured that while data safety so that simple and convenient；Also support
Multiple POSs carry out file and transmit and printed successively simultaneously, improve printing effect.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalents that bright specification and accompanying drawing content are made, or the technical field of correlation is directly or indirectly used in, similarly include
In the scope of patent protection of the present invention.
Claims (10)
1. a kind of POS Method of printing based on LAN, it is characterised in that including：
POS terminal is set up with the service end in same LAN and communicated to connect, and obtains the first printer letter of the service end
Breath；
Print request is encrypted POS terminal, obtains the first encryption information, and first encryption information is sent to the clothes
Business end, the print request includes mimeograph documents information, print parameters and the POS terminal from first Printer Information
Select the second obtained Printer Information；
Service end decrypts first encryption information, obtains mimeograph documents information, print parameters and the second Printer Information；
File to be printed is encrypted POS terminal, obtains the second encryption information, and second encryption information is uploaded into service
End；
Service end decrypts second encryption information, obtains file to be printed, and according to the mimeograph documents Information Authentication
File to be printed；
If being verified, service end prints the file to be printed according to print parameters and the second Printer Information.
2. the POS Method of printing according to claim 1 based on LAN, it is characterised in that " POS terminal and the place
Communication connection is set up in the service end of same LAN, and obtains the first Printer Information of the service end " be specially：
POS terminal sends broadcast request in LAN；
Service end is received after the broadcast request of POS terminal, by the IP address of the machine, TCP port information and mounted first
Printer Information is encrypted, and obtains the 3rd encryption information, and the 3rd encryption information is back into POS terminal；
POS terminal decrypts the 3rd encryption information, obtains IP address, TCP port information and the first printer letter of service end
Breath；
POS terminal is set up TCP communication with the service end by the IP address and TCP port information of the service end and is connected.
3. the POS Method of printing according to claim 1 based on LAN, it is characterised in that the mimeograph documents letter
Breath includes the file size of file to be printed；
" file to be printed according to the mimeograph documents Information Authentication " is specially：
Service end judge the file size of file to be printed that decryption obtains and the file size in mimeograph documents information whether one
Cause；
If so, then decision verification passes through.
4. the POS Method of printing according to claim 1 based on LAN, it is characterised in that described " to be treated described in printing
After mimeograph documents ", further comprise：
Print result is fed back to POS terminal by service end；
If file to be printed uploads failure, service end notifies POS terminal to upload file to be printed again.
5. the POS Method of printing based on LAN according to claim any one of 1-4, it is characterised in that the clothes
Business end is PC ends.
6. a kind of POS print system based on LAN, it is characterised in that including POS terminal and service end, the POS terminal bag
First memory and first processor are included, the service end includes second memory and second processor；
The first memory has program stored therein, and is configured to perform following steps by the first processor：
POS terminal is set up with the service end in same LAN and communicated to connect, and obtains the first printer letter of the service end
Breath；
Print request is encrypted POS terminal, obtains the first encryption information, and first encryption information is sent to the clothes
Business end, the print request includes mimeograph documents information, print parameters and the POS terminal from first Printer Information
Select the second obtained Printer Information；
File to be printed is encrypted POS terminal, obtains the second encryption information, and second encryption information is uploaded into service
End；
The second memory has program stored therein, and is configured to perform following steps by the second processor：
Service end decrypts first encryption information, obtains mimeograph documents information, print parameters and the second Printer Information；
Service end decrypts second encryption information, obtains file to be printed, and according to the mimeograph documents Information Authentication
File to be printed；
If being verified, service end prints the file to be printed according to print parameters and the second Printer Information.
7. the POS print system according to claim 6 based on LAN, it is characterised in that " POS terminal and the place
Communication connection is set up in the service end of same LAN, and obtains the first Printer Information of the service end " be specially：
POS terminal sends broadcast request in LAN；
Service end is received after the broadcast request of POS terminal, by the IP address of the machine, TCP port information and mounted first
Printer Information is encrypted, and obtains the 3rd encryption information, and the 3rd encryption information is back into POS terminal；
POS terminal decrypts the 3rd encryption information, obtains IP address, TCP port information and the first printer letter of service end
Breath；
POS terminal is set up TCP communication with the service end by the IP address and TCP port information of the service end and is connected.
8. the POS print system according to claim 6 based on LAN, it is characterised in that the mimeograph documents letter
Breath includes the file size of file to be printed；
" file to be printed according to the mimeograph documents Information Authentication " is specially：
Service end judge the file size of file to be printed that decryption obtains and the file size in mimeograph documents information whether one
Cause；
If so, then decision verification passes through.
9. the POS print system according to claim 6 based on LAN, it is characterised in that described " to be treated described in printing
After mimeograph documents ", further comprise：
Print result is fed back to POS terminal by service end；
If file to be printed uploads failure, service end notifies POS terminal to upload file to be printed again.
10. the POS print system based on LAN according to claim 6-9, it is characterised in that the service end is
PC ends.
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| CN201710455882.4A CN107274597A (en) | 2017-06-16 | 2017-06-16 | POS Method of printing and its system based on LAN |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109885266A (en) * | 2019-01-18 | 2019-06-14 | 联想图像（天津）科技有限公司 | A kind of method, apparatus, system and the mobile terminal of printer network connection |
| CN111913672A (en) * | 2020-07-16 | 2020-11-10 | 北京三快在线科技有限公司 | Communication establishing method, printer, storage medium and electronic device |
| CN112925487A (en) * | 2021-02-05 | 2021-06-08 | 北京互金新融科技有限公司 | Printing method and device of target content, storage medium and electronic device |
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| CN102841766A (en) * | 2012-08-22 | 2012-12-26 | 青岛飞鸽软件有限公司 | Local area network printing system and method |
| CN105005455A (en) * | 2015-06-26 | 2015-10-28 | 丁四涛 | Printing control method and device of intelligent terminal |
| CN106557285A (en) * | 2015-09-25 | 2017-04-05 | 腾讯科技（深圳）有限公司 | Method of printing and device |
| CN106406780A (en) * | 2016-10-15 | 2017-02-15 | 魏歌 | File print management method, equipment, server and system |
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| CN109885266A (en) * | 2019-01-18 | 2019-06-14 | 联想图像（天津）科技有限公司 | A kind of method, apparatus, system and the mobile terminal of printer network connection |
| CN111913672A (en) * | 2020-07-16 | 2020-11-10 | 北京三快在线科技有限公司 | Communication establishing method, printer, storage medium and electronic device |
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| CN112925487A (en) * | 2021-02-05 | 2021-06-08 | 北京互金新融科技有限公司 | Printing method and device of target content, storage medium and electronic device |
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Application publication date: 20171020 |