CN103730784B - A kind of socket eliminating electric spark - Google Patents
A kind of socket eliminating electric spark Download PDFInfo
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- CN103730784B CN103730784B CN201410045437.7A CN201410045437A CN103730784B CN 103730784 B CN103730784 B CN 103730784B CN 201410045437 A CN201410045437 A CN 201410045437A CN 103730784 B CN103730784 B CN 103730784B
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- limiting resistance
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Abstract
The present invention relates to a kind of socket eliminating electric spark, including supply socket and be arranged on electrical equipment the socket for power taking, can apply to the electrical equipment power taking of combustible and explosive area, or the power taking design for explosion-proof electric apparatus.It is characterized in that: least one set socket contact sheet path has the first socket contact sheet, the second socket contact sheet, current-limiting resistance, described second socket contact sheet is connected by described current-limiting resistance and the first socket contact sheet.Further, described current-limiting resistance uses plus or minus temperature coefficient thermistor.Benefit effect is: 1, as supply socket, can eliminate plug and insert, extracts the electric spark of generation, it is to avoid contact corrodes and burns out, and is suitable for the use of explosion-proof place；The electric spark produced when 2, can effectively prevent attaching plug from inserting as explosion-proof electric apparatus plug-in socket, extract.
Description
Technical field
The present invention relates to a kind of socket eliminating electric spark, including supply socket and be arranged on electrical equipment the socket for power taking, can apply to the electrical equipment power taking of combustible and explosive area, or the power taking design for explosion-proof electric apparatus.
Background technology
Appliance plug is inserted the moment of socket, owing to there is a bigger starting current, spark can be produced at contact point and produce heat, stable contact along with plug and socket contact, spark and heat disappear therewith, when appliance plug extracts socket, often due to the existence of load, also spark can be produced in the moment of contact separation, existence due to electric spark, can constantly corrode socket contact sheet and the header contact of socket, socket contact sheet and header contact can be burnt out time serious, additionally, spark and heat at combustible and explosive area power contact easily cause explosion accident.
Along with at oil, the application of petrochemical industry new technique, particularly information-based computer application, as: on-line analysis instrument, computer, PLC, active station, chargeable electric torch used in everyday, wireless interspeaker, notebook computers etc. all can run into power taking or charging problems, owing to existing charging adapter does not all account for Explosion-proof Design (maybe can not carry out Explosion-proof Design), contact sparking can be produced in the moment inserting or pull out socket, if directly using in anti-explosion area and easily causing explosion accident, electrical equipment plug-in socket of the present invention is used can effectively to eliminate the electric spark that electrical equipment obtains electricity moment and causes.
Owing to the starting current of electric equipment products is the biggest, the surge current of generation can produce harm to electrical equipment itself, can also interfere with the properly functioning of electrical network.
Summary of the invention
The thinking of the present invention is: make to be limited in less scope by the immediate current between socket contact sheet and header contact by current-limiting resistance when a plug is to be inserted into the socket; current break is prevented by current-limiting resistance when plug pulls away socket; thus avoid the generation of electric spark; thus protect contact, and it is suitable for explosion-proof place and uses.
The technical scheme is that
A kind of socket eliminating electric spark, including socket contact sheet path, is characterized in that: least one set socket contact sheet path has the first socket contact sheet, the second socket contact sheet, current-limiting resistance, and described second socket contact sheet is connected by described current-limiting resistance and the first socket contact sheet.
Described a kind of socket eliminating electric spark, is characterized in that: also concatenate resettable fuse in the circuit of described current-limiting resistance.
Described a kind of socket eliminating electric spark, is characterized in that: described resettable fuse is macromolecule organic PTC.
Described a kind of socket eliminating electric spark, is characterized in that: one group of described socket contact sheet path also has the 3rd socket contact sheet and is connected to another current-limiting resistance on described 3rd socket contact sheet, and another current-limiting resistance other end described and the first socket contact sheet are connected.
Described a kind of socket eliminating electric spark, is characterized in that: described current-limiting resistance is negative tempperature coefficient thermistor.
Described a kind of socket eliminating electric spark, is characterized in that: described negative tempperature coefficient thermistor is NTC thermistor.
Described a kind of socket eliminating electric spark, is characterized in that: described current-limiting resistance is semistor.
Described a kind of socket eliminating electric spark, is characterized in that: described semistor is PTC thermistor.
Described a kind of socket eliminating electric spark, is characterized in that: described current-limiting resistance nominal value range is 0.5K ~ 5K.
Described a kind of socket eliminating electric spark, is characterized in that: described current-limiting resistance nominal value range is 0.5 ohm ~ 100 ohm.
Described a kind of socket eliminating electric spark, is characterized in that: one group of described socket contact sheet path has more than three socket contact sheets and the corresponding current-limiting resistance being connected on described socket contact sheet, the described corresponding current-limiting resistance other end and the first socket contact sheet to be connected.
The invention has the beneficial effects as follows: 1, as supply socket, plug can be eliminated and insert, extract the electric spark of generation, it is to avoid contact corrodes and burns out, and be suitable for the use of explosion-proof place；The electric spark produced when 2, can effectively prevent attaching plug from inserting as explosion-proof electric apparatus plug-in socket, extract；3, the harm that electrical equipment is produced by surge current is eliminated, it is to avoid disturb the properly functioning of electrical network.
Accompanying drawing explanation
Fig. 1 is existing Switching Power Supply front end rectification circuit.
Fig. 2 is conventional socket and Plug contact process electric parameter variation diagram.
Fig. 3 is the present invention two contact power sour socket structure chart.
Fig. 4 is the second socket contact sheet and the header contact contact condition figure (t1-t2 period in corresponding diagram 6) of the present invention two contact power sour socket.
Fig. 5 is the first socket contact sheet and the header contact contact condition figure (t3-t4 period in corresponding diagram 6) of the present invention two contact power sour socket.
Fig. 6 is socket of the present invention and Plug contact process electric parameter variation diagram (two contacts).
Fig. 7 be the present invention be the present invention three contact power sour socket structure chart.
Fig. 8 is the 3rd socket contact sheet and the header contact contact condition figure of the present invention three contact power sour socket.
Fig. 9 is the second socket contact sheet and the header contact contact condition figure of the present invention three contact power sour socket.
Figure 10 is the first socket contact sheet and the header contact contact condition figure of the present invention three contact power sour socket.
Figure 11 is the explosion-proof electric apparatus plug-in socket structure chart of the present invention.
Figure 12 is the second socket contact sheet and the plug contacts state diagram of the explosion-proof electric apparatus plug-in socket of the present invention.
Figure 13 is the first socket contact sheet and the plug contacts state diagram of the explosion-proof electric apparatus plug-in socket of the present invention.
Figure 14 is the embodiment concatenating resettable fuse in current-limiting resistance circuit of the present invention.
Detailed description of the invention
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is existing Switching Power Supply front end rectification circuit.In Fig. 1,220V alternating current accesses rectification circuit by electric fuse F, and the full-wave bridge rectifier circuit being made up of D1, D2, D3, D4 commutation diode, electric capacity C is filter capacitor.Current most of power supply all uses Switching Power Supply, and such as laptop electric power, mobile phone charge power supply, general power is tens watts, the most hundreds of milliampere of rated current, equivalent resistance about about 1K.The moment of the power adapter plug insertion supply socket of such as notebook computer has explosion sound and with electric spark, is because filter capacitor generally large, can produce caused by bigger electric current in the moment of filter capacitor charging.
Additionally powering up of high-power electric appliance also can produce electric spark.
The starting current of electric equipment products is the biggest, can produce electric spark, and surge current can produce harm to electrical equipment itself simultaneously, can also interfere with the properly functioning of electrical network.
Fig. 2 is conventional socket and Plug contact process electric parameter variation diagram.Assume have a Switching Power Supply to insert conventional electrical outlet, 201 is the change in voltage figure between supply socket contact and header contact, 202 is the curent change figure passed through, before supply socket contact contacts with header contact, voltage is the 220V(0-t1 time period), t1 is supply socket contact and header contact point time of contact, maximum point Imax is reached immediately now by electric current, afterwards along with the charging of filter capacitor C, electric current declines, ultimate current is rated current Ir of electrical equipment, the equivalent rated resistance assuming electrical equipment is Rr, then: Ir=220/Rr, t2 time point stably rear contact voltage between supply socket contact and header contact reduces to 0, i.e. stable contact.
Fig. 3 is the present invention two contact power sour socket structure chart.In Fig. 3, 101 is supply socket, supply socket has two groups of socket contact sheet paths, one group is L path, another group is N path, in supply socket 101, L path includes the first socket contact sheet 102, current-limiting resistance 103(resistance R), second socket contact sheet 104, second socket contact sheet 104 is connected with the first socket contact sheet 102 by current-limiting resistance 103, first socket contact sheet 102 is connected to the L end (live wire end) of power supply, in like manner, another group is N path, N(zero line side with power supply) end be connected, N path and L access structure can be symmetrically the same, N path current-limiting resistance can also be removed and the first socket contact sheet and the second socket contact sheet are joined directly together (in figure, dotted line represents).105 is traditional plug, and 106 is header contact (L end), and 107 is plug lead wire.In supply socket of the present invention, grounding wafer path does not marks.
A kind of socket eliminating electric spark, including socket contact sheet path, is characterized in that: least one set socket contact sheet path has the first socket contact sheet, the second socket contact sheet, current-limiting resistance, and described second socket contact sheet is connected by described current-limiting resistance and the first socket contact sheet.
Fig. 4 is the second socket contact sheet and the header contact contact condition figure (t1-t2 period in corresponding diagram 6) of the present invention two contact power sour socket.
Fig. 5 is the first socket contact sheet and the header contact contact condition figure (t3-t4 period in corresponding diagram 6) of the present invention two contact power sour socket.
Fig. 6 is socket of the present invention and Plug contact process electric parameter variation diagram (two contacts).t1
The state of t2 time period corresponding diagram 4, when header contact contacts with the second socket contact sheet, do not consider N end current-limiting resistance (i.e. using dotted line scheme), maximum charging current is not over I=220/R, and the general current switching producing electric spark is more than 100mA, if selecting R=3K, then moment maximum current is 220V/3K=73mA, less than the electric current of make-and-break of generation electric spark, between t2-t3 time period contact, voltage is U=220*R/ (R+Rr), and electric current is I=220/ (R+Rr).The state of t3-t4 time period corresponding diagram 5, when header contact continues into and contacts with the first socket contact sheet, between contact, voltage drops to 0, by the normal rating electric current Ir that electric current is electrical equipment.
Fig. 7 be the present invention be the present invention three contact power sour socket structure chart.In view of reducing the voltage gradient between contact further, the quantity of socket contact sheet and current-limiting resistance can be increased, Fig. 7 increases current-limiting resistance 701 and the 3rd socket contact sheet 702.Can continue further to increase socket contact sheet and the quantity of current-limiting resistance, quantity does not limits.
Described a kind of socket eliminating electric spark, is characterized in that: one group of described socket contact sheet path also has the 3rd socket contact sheet and is connected to another current-limiting resistance on described 3rd socket contact sheet, and another current-limiting resistance other end described and the first socket contact sheet are connected.
Described a kind of socket eliminating electric spark, is characterized in that: one group of described socket contact sheet path also has more than three socket contact sheets and the corresponding current-limiting resistance being connected on described socket contact sheet, the described corresponding current-limiting resistance other end and the first socket contact sheet to be connected.
Fig. 8 is the 3rd socket contact sheet and the header contact contact condition figure of the present invention three contact power sour socket.
Fig. 9 is the second socket contact sheet and the header contact contact condition figure of the present invention three contact power sour socket.
Figure 10 is the first socket contact sheet and the header contact contact condition figure of the present invention three contact power sour socket.
Figure 11 is the explosion-proof electric apparatus plug-in socket structure chart of the present invention.Consider the employing socket power supply mode that existing explosion-proof electric apparatus has, such as explosion-proof notebook, explosion-proof Communication Equipment, the plug-in socket of explosion-proof electric apparatus is designed at least as two socket contact sheet structures, 1101 is explosion-proof electric apparatus plug-in socket, and 1102 is cathode contact, and 1103 is the first socket contact sheet, 1104 is current-limiting resistance, 1105 is the second socket contact sheet, and 1106 is plug, and 1107 is power supply adaptor.
Figure 12 is the second socket contact sheet and the plug contacts state diagram of the explosion-proof electric apparatus plug-in socket of the present invention.
Figure 13 is the first socket contact sheet and the plug contacts state diagram of the explosion-proof electric apparatus plug-in socket of the present invention.
Current-limiting resistance resistance of the present invention is not as the qualifications of the present invention, socket contact sheet quantity condition the most not as limiting to the invention of the present invention.
Current-limiting resistance of the present invention is one of following or combination: fixed resistance, negative tempperature coefficient thermistor, semistor.Negative tempperature coefficient thermistor such as NTC thermistor, semistor such as PTC thermistor, PTC thermistor includes resettable fuse i.e. macromolecule organic PTC.
Described current-limiting resistance uses negative tempperature coefficient thermistor, i.e. along with temperature increases, resistance reduces, the most existing power-type NTC thermistor, when the second socket contact sheet and header contact Contact NTC thermistor resistance are maximum, minimum by electric current, along with being increased by temperature of electric current, resistance reduces, ultimate current reaches maximum, the final resistance of General N TC critesistor is smaller, by electric current close to the rated current loaded, along with header contact contacts with the first socket contact sheet, NTC thermistor is shorted ineffective, plug and socket formally contacts and normally works.Here simply work in the moment of plug insertion socket due to NTC thermistor, be idle at ordinary times, thus extend the service life of NTC thermistor.Such as: NTC thermistor chooses existing 3.3K nominal value, B constant 3950K, during temperature 25 degree, resistance value is 3.3K, when temperature rises to 125 degree, resistance value is 0.113K, by calculating (not considering load): when 25 degree, electric current is 220V/3.3K=66.7 milliampere, when 125 degree, electric current is 220V/0.113K=1947 milliampere, existence in view of load, when the second socket contact sheet and Plug contact moment maximum current are less than 66.7 milliamperes, along with NTC thermistor temperature rises and resistance reduction, increased by electric current, maximum current is not over the rated current of load, when the first socket contact sheet contacts with header contact, load obtains normal rated current, NTC thermistor quits work simultaneously.Can be seen that whole process efficiently reduces pick-up current, it is to avoid the charging current existed because of electric capacity and the surge current of appliance starting.
Described current-limiting resistance uses semistor, i.e. along with temperature increases, resistance increases, the most existing PTC thermistor, when the second socket contact sheet and header contact Contact PTC thermistor resistance are minimum, maximum by electric current, along with being increased by temperature of electric current, resistance increases, at this moment the charging process of electric capacity in electrical appliance is had been completed, along with header contact contacts with the first socket contact sheet, PTC thermistor is shorted ineffective, and plug and socket formally contacts and normally works.The current-limiting resistance that the benefit of employing PTC thermistor may cause when being the plug insertion socket that can avoid high-power electric appliance is overheated.nullSuch as: PTC thermistor chooses existing 3.3K nominal value，Temperature-coefficient of electrical resistance 10 [[%]]/DEG C，During temperature 25 degree, resistance value is 3.3K，When temperature rises to 45 degree，Resistance value is about 22K，By calculating (not considering load): when 25 degree, electric current is 220V/3.3K=66.7 milliampere，When 45 degree, electric current is 220V/22K=10 milliampere，Existence in view of load，When the second socket contact sheet and Plug contact moment maximum current are less than 66.7 milliamperes，Along with PTC thermistor temperature rises and resistance increase，When 45 degree, electric current is about 10 milliamperes，Resistive dissipation power is the lowest，Bigger intensification will not be produced，When the first socket contact sheet contacts with header contact, load obtains normal rated current，PTC thermistor quits work simultaneously.Can be seen that whole process efficiently reduces pick-up current, it is to avoid the charging current existed because of electric capacity and the surge current of appliance starting.
Figure 14 is the embodiment concatenating resettable fuse in current-limiting resistance circuit of the present invention.Resettable fuse is a kind of macromolecule organic PTC resistance, demarcating, the following resistance value of temperature is minimum, when self-heating or ambient temperature reach to demarcate temperature, its resistance value steeply rises thus plays the effect of electric fuse, and resettable fuse can realize the delay time of current blocking by heat radiation its thermal inertia of change changing himself.In Figure 14,103 is current-limiting resistance, it can be fixed resistance, or NTC thermistor, or PTC thermistor, 1401 is resettable fuse, current-limiting resistance 103 and resettable fuse 1401 are installed together, select to demarcate the resettable fuse of temperature (such as 60 degree), generally header contact and the second socket contact sheet 104 are the shortest for time of contact, so the heating of current-limiting resistance 103 is little, if there is the situation that header contact and second socket contact sheet 104 time of contact are the longest, when current-limiting resistance 103 temperature reaches 60 degree, resettable fuse 1401 will block electric current.In Figure 14,1402 is the another kind of socket contact sheet of N path, and this socket contact sheet is straight-through socket contact sheet.
The specified equivalent resistance assuming electrical appliance is Rr, and voltage is 220V, then the dissipated power of current-limiting resistance R is: R*220^2* (R+Rr)
^ (-2), owing to electrical appliance power is different, so the specified equivalent resistance of electrical appliance is the most different, in view of the most conventional laptop electric power power 10W ~ 100W, the nominal value selecting current-limiting resistance is 0.5K ~ 5K, dissipated power about 10W ~ 100W, resettable fuse nominal temperature is chosen as 60 degree ~ 100 degree.
Specific embodiments as a kind of power extension socket: within arranging the outlet jack of different capacity, such as 500W, selects the scope that nominal value is 0.5K ~ 5K of current-limiting resistance, such as selects the fixed resistance of 3.3K；High-power electric appliance (500W ~ 2500W) selects the scope that nominal value is 0.5 ohm ~ 100 ohm of current-limiting resistance, such as selects 30 ohm of NTC thermistor (model 30D-9), residual resisitance about 1 ohm.
Claims (5)
1. eliminating a socket for electric spark, including socket contact sheet path, it is characterized in that: least one set socket contact sheet path has the first socket contact sheet, the second socket contact sheet, current-limiting resistance, described second socket contact sheet is connected by described current-limiting resistance and the first socket contact sheet；
One group of described socket contact sheet path also has the 3rd socket contact sheet and is connected to another current-limiting resistance on described 3rd socket contact sheet, and another current-limiting resistance other end described and the first socket contact sheet are connected；
Described current-limiting resistance is negative tempperature coefficient thermistor.
A kind of socket eliminating electric spark the most according to claim 1, is characterized in that: also concatenate resettable fuse in the circuit of described current-limiting resistance.
A kind of socket eliminating electric spark the most according to claim 2, is characterized in that: described resettable fuse is macromolecule organic PTC.
A kind of socket eliminating electric spark the most according to claim 1, is characterized in that: described negative tempperature coefficient thermistor is NTC thermistor.
5. according to a kind of socket eliminating electric spark described in claim 1 or 2 or 3 or 4, it is characterized in that: one group of described socket contact sheet path has more than three socket contact sheets and the corresponding current-limiting resistance being connected on described socket contact sheet, the described corresponding current-limiting resistance other end and the first socket contact sheet to be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410045437.7A CN103730784B (en) | 2014-01-19 | 2014-02-08 | A kind of socket eliminating electric spark |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2014100220637 | 2014-01-19 | ||
| CN201410022063.7 | 2014-01-19 | ||
| CN201410022063 | 2014-01-19 | ||
| CN201410045437.7A CN103730784B (en) | 2014-01-19 | 2014-02-08 | A kind of socket eliminating electric spark |
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| Publication Number | Publication Date |
|---|---|
| CN103730784A CN103730784A (en) | 2014-04-16 |
| CN103730784B true CN103730784B (en) | 2016-12-07 |
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| CN201410045437.7A Expired - Fee Related CN103730784B (en) | 2014-01-19 | 2014-02-08 | A kind of socket eliminating electric spark |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023051957A1 (en) * | 2021-09-30 | 2023-04-06 | Eaton Intelligent Power Limited | Electrical connection arrangement for reducing arc energy and erosion in a contact system |
Families Citing this family (5)
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| CN105610019B (en) * | 2014-11-05 | 2018-07-03 | 华为数字技术（苏州）有限公司 | A kind of socket and plug void insert detection circuit, device, method |
| JP2016103429A (en) * | 2014-11-28 | 2016-06-02 | 富士通コンポーネント株式会社 | connector |
| CN106450071B (en) * | 2015-08-04 | 2019-08-06 | 南京德朔实业有限公司 | Battery pack and its with the combination of electric tool and the method for connecting them |
| CN107134683B (en) * | 2016-02-26 | 2019-08-16 | 泰科电子(上海)有限公司 | Power connector |
| CN107658595B (en) * | 2017-08-30 | 2024-09-24 | 珠海格力电器股份有限公司 | Sectional safety socket and plug |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997007571A1 (en) * | 1995-08-11 | 1997-02-27 | Maspro Denkoh Co., Ltd. | Branching device |
| CN201117979Y (en) * | 2007-09-22 | 2008-09-17 | 卢瑞军 | Small power electric appliance fireproofing power socket |
| CN101431202A (en) * | 2008-12-09 | 2009-05-13 | 沈佳玲 | Safety plug |
| CN201741874U (en) * | 2010-07-27 | 2011-02-09 | 宋洋 | Big-power anti-arc power socket |
-
2014
- 2014-02-08 CN CN201410045437.7A patent/CN103730784B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997007571A1 (en) * | 1995-08-11 | 1997-02-27 | Maspro Denkoh Co., Ltd. | Branching device |
| CN201117979Y (en) * | 2007-09-22 | 2008-09-17 | 卢瑞军 | Small power electric appliance fireproofing power socket |
| CN101431202A (en) * | 2008-12-09 | 2009-05-13 | 沈佳玲 | Safety plug |
| CN201741874U (en) * | 2010-07-27 | 2011-02-09 | 宋洋 | Big-power anti-arc power socket |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023051957A1 (en) * | 2021-09-30 | 2023-04-06 | Eaton Intelligent Power Limited | Electrical connection arrangement for reducing arc energy and erosion in a contact system |
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| CN103730784A (en) | 2014-04-16 |
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Inventor after: Jiao Qingli Inventor after: Wang Wei Inventor after: Ding Limei Inventor before: Lu Tengjiao Inventor before: Request for anonymity |
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Effective date of registration: 20160920 Address after: 276800 Yantai Road, Shandong, No. 68, No. Applicant after: STATE GRID SHANDONG ELECTRIC POWER COMPANY RIZHAO POWER SUPPLY Co. Address before: Tianhe District Tong East Road Guangzhou city Guangdong province 510665 B-101 No. 5, room B-118 Applicant before: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Effective date of registration: 20160920 Address after: Tianhe District Tong East Road Guangzhou city Guangdong province 510665 B-101 No. 5, room B-118 Applicant after: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Address before: Haimen City 226136 Jiangsu city of Nantong province Wansheng rural village 44 years group Applicant before: Lu Tengjiao |
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