CN108766050A - Portable information technology teaching experiment box - Google Patents
Portable information technology teaching experiment box Download PDFInfo
- Publication number
- CN108766050A CN108766050A CN201810648274.XA CN201810648274A CN108766050A CN 108766050 A CN108766050 A CN 108766050A CN 201810648274 A CN201810648274 A CN 201810648274A CN 108766050 A CN108766050 A CN 108766050A
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- China
- Prior art keywords
- box
- lower box
- interior bar
- interface board
- portable information
- Prior art date
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- 238000005516 engineering process Methods 0.000 title abstract description 16
- 238000000034 method Methods 0.000 claims description 18
- 239000003381 stabilizer Substances 0.000 claims description 4
- 238000005192 partition Methods 0.000 abstract 4
- 238000010586 diagram Methods 0.000 description 8
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
- A45C11/00—Receptacles for purposes not provided for in groups A45C1/00-A45C9/00
- A45C11/24—Etuis for purposes not covered by a single one of groups A45C11/02 - A45C11/22, A45C11/26, A45C11/32 - A45C11/38
Landscapes
- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Physics & Mathematics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electrically Operated Instructional Devices (AREA)
Abstract
The invention discloses a portable experimental box for information technology teaching, which comprises a box body, a telescopic rod, a display placing plate, a placing drawer and an interface board, wherein the box body is of a square box structure, the inner side of the box body is provided with a cavity, the box body at least comprises an upper box body and a lower box body, the telescopic rod is connected between the upper box body and the lower box body, jacks are arranged in the lower box body, the jacks are arranged at four corners of the inner side of the lower box body in a rectangular array mode, a partition plate and the interface board are arranged on the lower box body, the partition plate is arranged on the lower box body in the middle and symmetrically separates the lower box body, the display placing plate is hinged to the partition plate, a placing groove is formed in the display placing plate, one end of the display placing plate is hinged to the partition plate, the other end of the display placing plate. This portable information technology teaching is with experimental box, rational in infrastructure, have the practicality strong, characteristics such as portable can the wide use.
Description
Technical field
The invention belongs to teaching aid technical fields, and in particular to a kind of portable information technique teaching experimental box.
Background technology
Information technology (InformationTechnology, abridge IT) is primarily used for managing and processing information is used
Various technologies general name.It is mainly applied computer science and the communication technology to design, develop, install and implementation information system
System and application software include mainly sensing technology, computer and intellectual technology, the communication technology and control technology, information technology religion
It educates including two fields of theory and practice.It is a science that theoretical field, which refers to Information Education, is that modern pedagogy is studied
One Ge Xin branches, and some features with curriculum and teaching theory, specifically include concept system, theoretical frame, principle, proposition, mould
The research contents such as formula, methodology.It is a kind of education activities, a kind of working practice, a religion that the field of practice, which refers to Information Education,
Cause of modernization is educated, the software and hardware resources construction of information technology, the designing and developing of course teaching materials, faculty training, religion are specifically included
The integrated use of various information technologies, learning guide, evaluation and management etc. in.
Currently, because information is not no entity so that the content of courses of information technology is to just contacting this subject
Life is difficult to understand for, it is therefore desirable to and some teaching equipments demonstrate for student, and existing display equipment volume is heavy, inconvenient for use,
And have a single function, it does not put and does not carry and move, student can only be learnt by specific classroom, be made troubles to teaching.
Invention content
The purpose of the present invention is to provide a kind of portable information technique teaching experimental boxs, to solve above-mentioned background technology
The problem of middle proposition.
To achieve the above object, the present invention provides the following technical solutions：A kind of portable information technique teaching experimental box,
Including babinet, telescopic rod, display placement plate, drawer and interface board are placed, the babinet is the square chest that inside offers chamber
Shape structure, and babinet includes at least upper box and lower box, the upper box and lower box are square structure, and vertical splicing
Babinet is formed, telescopic rod is connected between the upper box and lower box, and upper box avris is provided with placement drawer, under described
Babinet includes at least display placement plate and interface board, and jack, the jack rectangular array are offered on the inside of the lower box
Inside four corners in lower box are set, demarcation strip and interface board are provided on the lower box, the demarcation strip is centrally located
It is symmetrically separated on lower box, and by lower box, display placement plate is hinged on the demarcation strip, the display is placed
Plate is rectangle structure, and placing groove is offered in display placement plate, and display placement plate one end is hinged on demarcation strip
On, the other end is hinged with supporting rod, and the supporting rod is rectangle rod-like structure.
Preferably, the telescopic rod includes at least outer bar and interior bar, and the outer bar is set in interior bar outer end, the outer bar and
Interior bar is cylinder tubular structure, and the first opening is offered in interior bar, and fixture block, the fixture block are provided on the inside of the interior bar
For cylindrical structure, and fixture block one end passes through the first opening to stretch to the inside of interior bar, and the other end extends to the outer end of interior bar, institute
It states fixture block and stretches on the inside of interior bar and spring is installed, the spring one end is fixedly connected on the inner wall of interior bar, and the other end is fixed
It is connected on fixture block, the fixture block is vertically arranged with multigroup, and the second opening is offered in outer bar, the fixture block is opened across first
Mouth and the second opening, and interior bar and outer bar connect and fix, the interior bar top is connected on upper box, outer bar bottom end grafting
On the inside of jack.
Preferably, the demarcation strip side is provided with interface board, and the interface board bottom end is equipped with host computer, and interface
Plate is electrically connected host computer, is provided with USB interface on the interface board, the USB interface side is provided with CD-ROM driver interface.
Preferably, described supporting rod one end is hinged on the side wall of display placement plate, and the other end is connected with sliding block, and supports
Bar is equipped with connecting shaft in sliding block junction, and the supporting rod is rotatablely connected sliding block, offers sliding slot on the inside of the lower box, institute
It states sliding block to slide along sliding slot, the display placement plate is taken down the exhibits by the sliding of supporting rod.
Preferably, it is both provided with fixed strip on the joint face outer wall of the upper box and lower box, the fixed strip is along upper
The surrounding of babinet and nowel contact level is arranged, and fixation is fixedly installed on the fixed strip of the upper box and lower box front end
Block, offers the cunning mouth for buckle sliding on the inside of the fixed strip on the lower box, and the buckle is G shape and structures, and bottom end
Link block stretches on the inside of the cunning mouth of the fixed strip on lower box, and is slidably connected therewith.
Preferably, placement drawer is provided on the upper box, the placement drawer front is fixedly installed knob, described
It places drawer both sides and is fixedly installed slide plate, being in parallel array on the slide plate upper and lower surface has multigroup pulley, the upper box
Inside is fixedly installed fixed plate, and slide plate is slidably connected fixed plate by pulley.
Preferably, the bottom end four corners array of the lower box has four groups of stabilizer blades, is all provided on the upper box and lower box
It is equipped with handle, the interface board lower end offers heat emission hole on lower box avris.
The technique effect and advantage of the present invention：The portable information technique teaching experimental box, upper box and lower box it
Between be provided with telescopic rod, upper box and lower box are unfolded by telescopic rod, save space, floor space is smaller, by supporting rod
It is connected and fixed by fixture block, it is easy-to-use convenient for adjusting height, it places drawer and can be used for placing the work used when some teaching
Tool, practicability is high, and by display placement plate placement display, display placement plate is packed up by supporting rod expansion, convenient for behaviour
To make, display is put into display placement plate, angular adjustment facility is easy to use, and when without using babinet, storage is convenient,
After babinet is shunk, upper box and lower box are fixed by buckling, babinet has been carried by handle, easy to remove and carrying should
Portable information technique teaching experimental box, it is reasonable for structure, there is the features such as highly practical, easy to carry, can be widely used.
Description of the drawings
Fig. 1 is the dimensional structure diagram of the present invention；
Fig. 2 is the unfolded state structural schematic diagram of the present invention；
Fig. 3 is the lower box shell mechanism schematic diagram of the present invention；
Fig. 4 is the lower box structural schematic diagram of the present invention；
Fig. 5 is enlarged structure schematic diagram at A in Fig. 4 of the present invention；
Fig. 6 is the telescopic rod front view of the present invention；
Fig. 7 is the upper box and connecting structure for drawer schematic diagram of the present invention；
Fig. 8 is the skateboard schematic diagram of the present invention；
Fig. 9 is the buckle and fixed strip attachment structure schematic diagram of the present invention.
In figure：1 babinet, 2 upper boxes, 3 lower boxes, 4 telescopic rods, 5 jacks, 6 buckles, 7 handles, 8 fixed blocks, 9 stabilizer blades, 10
Placing groove, 11 display placement plates, 12 demarcation strips, 13USB interfaces, 14 CD-ROM driver interfaces, 15 interface boards, 16 heat emission holes, 17 supports
Bar, 18 sliding blocks, 19 sliding slots, 20 interior bars, 21 springs, 22 outer bars, 23 first openings, 24 fixture blocks, 25 second openings, 26, which are placed, takes out
Drawer, 27 knobs, 28 slide plates, 29 pulleys, 30 link blocks, 31 connecting shafts, 32 fixed strips.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of portable information technique teaching experimental box as shown in figs 1-9, including babinet 1, stretch
Contracting bar 4, display placement plate 11 place drawer 26 and interface board 15, and the babinet 1 is the square box shape knot that inside offers chamber
Structure, and babinet 1 includes at least upper box 2 and lower box 3, the upper box 2 and lower box 3 are square structure, and vertical spelling
Composition babinet 1 is connect, telescopic rod 4 is connected between the upper box 2 and lower box 3, and 2 avris of upper box is provided with placement drawer
26, the lower box 3 includes at least display placement plate 11 and interface board 15, and 3 inside of the lower box offers jack 5, institute
It states 5 rectangular array of jack and inside four corners in lower box 3 is set, demarcation strip 12 and interface are provided on the lower box 3
Plate 15, the demarcation strip 12 are centrally positioned on lower box 3, and lower box 3 is symmetrically separated, hinged on the demarcation strip 12
There is display placement plate 11, the display placement plate 11 is rectangle structure, and placement is offered in display placement plate 11
Slot 10, described 11 one end of display placement plate are hinged on demarcation strip 12, and the other end is hinged with supporting rod 17, the supporting rod 17
For rectangle rod-like structure, supporting rod 17 with support display placement plate 11.
Specifically, the telescopic rod 4 includes at least outer bar 22 and interior bar 20, the outer bar 22 is set in 20 outer end of interior bar,
The outer bar 22 and interior bar 20 are cylinder tubular structure, and the first opening 23 is offered in interior bar 20, in the interior bar 20
Side is provided with fixture block 24, and the fixture block 24 is cylindrical structure, and 24 one end of fixture block passes through the first opening 23 to stretch to interior bar 20
Inside, the other end extends to the outer end of interior bar 20, and the fixture block 24, which stretches at 20 inside of interior bar, is equipped with spring 21, described
21 one end of spring is fixedly connected on the inner wall of interior bar 20, and the other end is fixedly connected on fixture block 24, and the fixture block 24 is vertically arranged
Have multigroup, and offers the second opening 25 in outer bar 22, the fixture block 24 passes through the first opening 23 and the second opening 25, and interior bar
20 and outer bar 22 connect and fix, 20 top of the interior bar is connected on upper box 2, and 22 bottom end of the outer bar is plugged in jack 5
When side, upper box 2 and lower box 3 are unfolded, fixed by telescopic rod 4.
Specifically, 12 side of the demarcation strip is provided with interface board 15,15 bottom end of the interface board is equipped with host computer,
And interface board 15 is electrically connected host computer, is provided with usb 13 on the interface board 15,3 side of the usb 1 is set
It is equipped with CD-ROM driver interface 14, use when usb 13 and CD-ROM driver interface 14 are used to impart knowledge to students, but is being embodied on interface board 15
When, interface can be increased, be not limited only to usb 13 and CD-ROM driver interface 14.
Specifically, 17 one end of the supporting rod is hinged on the side wall of display placement plate 11, the other end is connected with sliding block 18,
And supporting rod 17 is equipped with connecting shaft 31 in 18 junction of sliding block, the supporting rod 17 is rotatablely connected sliding block 18, the lower box 3
Inside offers sliding slot 19, and the sliding block 18 is slided along sliding slot 19, the sliding that the display placement plate 11 passes through supporting rod 17
It takes down the exhibits, the sliding setting of supporting rod 17, more convenient operation.
Specifically, being both provided with fixed strip 32, the fixed strip on the joint face outer wall of the upper box 2 and lower box 3
32 are arranged along the surrounding of 3 contact surface of upper box 2 and lower box, fixed on the fixed strip 32 of 3 front end of the upper box 2 and lower box
It is provided with fixed block 8,32 inside of fixed strip on the lower box 3 offers the cunning mouth for 6 sliding of buckle, and the buckle 6 is G
Shape and structure, and bottom end link block 30 stretches on the inside of the cunning mouth of the fixed strip 32 on lower box 3, and be slidably connected therewith, lead to
Cross the fixed block 8 on 6 locking upper box 2 of buckle and lower box 3.
Drawer 26 is placed specifically, being provided on the upper box 2,26 front end of placement drawer is fixedly installed knob
27,26 both sides of placement drawer are fixedly installed slide plate 28, and being in parallel array on 28 upper and lower surface of the slide plate has multigroup cunning
Wheel 29, the inside of the upper box 2 are fixedly installed fixed plate, and slide plate 28 is slidably connected fixed plate by pulley 29, is being imparted knowledge to students
When, it can will place the stretching of drawer 26 and open, take or store teaching aid.
Specifically, the bottom end four corners array of the lower box 3 has four groups of stabilizer blades 9, on the upper box 2 and lower box 3
It is both provided with handle 7,15 lower end of the interface board offers heat emission hole 16 on 3 avris of lower box, makes babinet 1 by handle 7
Easy to carry, heat emission hole 16 is used for the heat dissipation of host.
Specifically, the portable information technique teaching experimental box, when in use, sliding buckle 6 are upward by upper box 2
It is stretched to after need to using height, by the alignment of fixture block 24 first opening 23 and the second opening 25, the elastic force of spring 21 pops up fixture block 24,
Telescopic rod 4, which is formed, to be fixed, and display placement plate 11 is started, supporting rod 17 is slid into rear end by sliding block 18, by display
Placement plate 11 is fixed, and 11 inside of display placement plate is placed with display, and display is connect with host computer, for showing teaching
Content, host computer are arranged in the bottom end of interface board 15, and display and host computer are detachably arranged with babinet 1, lower box 3
On offer heat emission hole 16, radiate convenient for host computer, on interface board 15 in the specific implementation, interface can be increased, not only limited
In usb 13 and CD-ROM driver interface 14, in teaching, it can will place the stretching of drawer 26 and open, take or store teaching aid, impart knowledge to students
After the completion of demonstration, the sliding of supporting rod 17 is returned into original position, display placement plate 11 is tiled, telescopic rod 4 is shunk, upper box 2
Merge with lower box 3, sliding buckle 6 locks upper box 2 and the fixed block 8 on lower box 3, and Portable box is moved by handle 7
Body 1, the portable information technique teaching experimental box is reasonable for structure, has the features such as highly practical, easy to carry, can be extensive
It uses.
Finally it should be noted that：The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
With technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in the present invention's
Within protection domain.
Claims (7)
1. a kind of portable information technique teaching experimental box, including babinet（1）, telescopic rod（4）, display placement plate（11）,
Place drawer（26）And interface board（15）, it is characterised in that：The babinet（1）The square box shape structure of chamber is offered for inside,
And babinet（1）Including at least upper box（2）And lower box（3）, the upper box（2）And lower box（3）It is square structure, and
Vertical splicing composition babinet（1）, the upper box（2）And lower box（3）Between be connected with telescopic rod（4）, and upper box（2）Side
Side is provided with placement drawer（26）, the lower box（3）Including at least display placement plate（11）And interface board（15）, under described
Babinet（3）Inside offers jack（5）, the jack（5）Rectangular array is arranged in lower box（3）Inside four corners, institute
State lower box（3）On be provided with demarcation strip（12）And interface board（15）, the demarcation strip（12）It is centrally positioned in lower box（3）
On, and by lower box（3）It symmetrically separates, the demarcation strip（12）On be hinged with display placement plate（11）, the display
Placement plate（11）For rectangle structure, and display placement plate（11）On offer placing groove（10）, the display placement plate
（11）One end is hinged on demarcation strip（12）On, the other end is hinged with supporting rod（17）, the supporting rod（17）It is rod-shaped for rectangle
Structure.
2. a kind of portable information technique teaching experimental box according to claim 1, it is characterised in that：The telescopic rod
（4）Including at least outer bar（22）And interior bar（20）, the outer bar（22）It is set in interior bar（20）Outer end, the outer bar（22）With it is interior
Bar（20）It is cylinder tubular structure, and interior bar（20）On offer the first opening（23）, the interior bar（20）Inside is arranged
There is fixture block（24）, the fixture block（24）For cylindrical structure, and fixture block（24）One end passes through the first opening（23）Stretch to interior bar
（20）Inside, the other end extends to interior bar（20）Outer end, the fixture block（24）Stretch to interior bar（20）It is equipped with inside
Spring（21）, the spring（21）One end is fixedly connected on interior bar（20）Inner wall, the other end is fixedly connected on fixture block（24）On,
The fixture block（24）It is vertically arranged with multigroup, and outer bar（22）On offer the second opening（25）, the fixture block（24）Across
One opening（23）With the second opening（25）, and interior bar（20）And outer bar（22）It connects and fixes, the interior bar（20）Top is connected to
Upper box（2）On, the outer bar（22）Bottom end is plugged on jack（5）Inside.
3. a kind of portable information technique teaching experimental box according to claim 1, it is characterised in that：The demarcation strip
（12）Side is provided with interface board（15）, the interface board（15）Bottom end is equipped with host computer, and interface board（15）Electrically connect
Connect host computer, the interface board（15）On be provided with USB interface（13）, the USB interface（13）Side is provided with CD-ROM drive and connects
Mouthful（14）.
4. a kind of portable information technique teaching experimental box according to claim 1, it is characterised in that：The supporting rod
（17）One end is hinged on display placement plate（11）Side wall, the other end is connected with sliding block（18）, and supporting rod（17）In sliding block
（18）Junction is equipped with connecting shaft（31）, the supporting rod（17）It is rotatablely connected sliding block（18）, the lower box（3）It opens inside
Equipped with sliding slot（19）, the sliding block（18）Along sliding slot（19）Sliding, the display placement plate（11）Pass through supporting rod（17）'s
Sliding is taken down the exhibits.
5. a kind of portable information technique teaching experimental box according to claim 1, it is characterised in that：The upper box
（2）And lower box（3）Joint face outer wall on be both provided with fixed strip（32）, the fixed strip（32）Along upper box（2）With under
Babinet（3）The surrounding of contact surface is arranged, the upper box（2）And lower box（3）The fixed strip of front end（32）On be fixedly installed
Fixed block（8）, the lower box（3）On fixed strip（32）Inside is offered for buckle（6）The cunning mouth of sliding, the buckle
（6）For G shape and structures, and bottom end link block（30）Stretch to lower box（3）On fixed strip（32）Cunning mouth on the inside of, and therewith
It is slidably connected.
6. a kind of portable information technique teaching experimental box according to claim 1, it is characterised in that：The upper box
（2）On be provided with placement drawer（26）, the placement drawer（26）Front end is fixedly installed knob（27）, the placement drawer
（26）Both sides are fixedly installed slide plate（28）, the slide plate（28）There is multigroup pulley in parallel array on upper and lower surface（29）, institute
State upper box（2）Inside is fixedly installed fixed plate, and slide plate（28）Pass through pulley（29）Be slidably connected fixed plate.
7. a kind of portable information technique teaching experimental box according to claim 1, it is characterised in that：The lower box
（3）Bottom end four corners array have four groups of stabilizer blades（9）, the upper box（2）And lower box（3）On be both provided with handle（7）, institute
State interface board（15）Lower end is in lower box（3）Heat emission hole is offered on avris（16）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810648274.XA CN108766050A (en) | 2018-06-22 | 2018-06-22 | Portable information technology teaching experiment box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810648274.XA CN108766050A (en) | 2018-06-22 | 2018-06-22 | Portable information technology teaching experiment box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108766050A true CN108766050A (en) | 2018-11-06 |
Family
ID=63976478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810648274.XA Pending CN108766050A (en) | 2018-06-22 | 2018-06-22 | Portable information technology teaching experiment box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108766050A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110464098A (en) * | 2019-01-09 | 2019-11-19 | 淄博职业学院 | A kind of Mechanical Design Teaching practices device |
| CN110930891A (en) * | 2019-11-14 | 2020-03-27 | 深圳博邦诚光电有限公司 | Municipal works are with outdoor LED display screen |
| CN111086726A (en) * | 2020-01-14 | 2020-05-01 | 唐山师范学院 | English teaching aid rack |
| CN111725971A (en) * | 2020-06-05 | 2020-09-29 | 河南蓝通信息技术有限公司 | Mobile communication power supply |
| CN112150864A (en) * | 2020-11-09 | 2020-12-29 | 佳木斯大学 | Mathematics teaching is with professional course display device |
| CN113327481A (en) * | 2021-04-23 | 2021-08-31 | 重庆三峡医药高等专科学校 | Music education device |
| CN114137855A (en) * | 2021-11-26 | 2022-03-04 | 铁力山（北京）控制技术有限公司 | Intelligent portable draw-bar box type control console |
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| CN112150864A (en) * | 2020-11-09 | 2020-12-29 | 佳木斯大学 | Mathematics teaching is with professional course display device |
| CN113327481A (en) * | 2021-04-23 | 2021-08-31 | 重庆三峡医药高等专科学校 | Music education device |
| CN114137855A (en) * | 2021-11-26 | 2022-03-04 | 铁力山（北京）控制技术有限公司 | Intelligent portable draw-bar box type control console |
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Application publication date: 20181106 |