CN103135002A - Test system and method associated to safety certification - Google Patents
Test system and method associated to safety certification Download PDFInfo
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- CN103135002A CN103135002A CN2011103781254A CN201110378125A CN103135002A CN 103135002 A CN103135002 A CN 103135002A CN 2011103781254 A CN2011103781254 A CN 2011103781254A CN 201110378125 A CN201110378125 A CN 201110378125A CN 103135002 A CN103135002 A CN 103135002A
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Abstract
Provided are a test system and method associated to safety certification. The test method includes that two groups of verification parameters which are formed after a circuit board to be tested passes electromagnetic interference safety certification and electrostatic discharge safety certification are built in advance, and therefore when the circuit board to be tested is subjected to electromagnetic interference (EMI) testing or electrostatic discharge (ESD) testing, shielding casings arranged on some functional modules of the circuit board to be tested and connection iron casings of some connectors can/cannot be connected to a system to be grounded in guide mode at proper time. Therefore, the circuit board to be tested is ensured to pass safety certification, and damage of electronic elements arranged on the circuit board to be tested caused by influence of EMI testing or ESD testing is avoided.
Description
Technical field
The present invention relates to a kind of measuring technology, relate in particular to a kind of test macro and method thereof that is associated with Safety Approval.
Background technology
The existing designed circuit board that is associated with electronic product (PCB) all needs the Safety Approval by various countries, and electromagnetic interference (EMI) (electromagnetic interference, EMI) test is two test link/indexs important in the Safety Approval of circuit board under test with static discharge (electrostatic discharge, ESD) test.Yet, some functional module (function module due to circuit board under test, some communication module for example) shielding casing (shield case) on is connected iron-clad when carrying out electromagnetic interference (EMI) (EMI) test or static discharge (ESD) test with some connector (connector), especially easily absorbs the external interference source and sentences the electronic component that destroys on circuit board under test to system earth.Therefore, how when being carried out Safety Approval, circuit board under test not undermine the electronic component on circuit board under test, one of real problem of making great efforts/pondering for those skilled in the art institute wish.
Summary of the invention
In view of this, the invention provides a kind of test macro and method thereof that can be associated with Safety Approval.
An one exemplary embodiment of the present invention provides a kind of test macro that is associated with Safety Approval, and it comprises: a circuit board under test, a control panel, and a parameter feed end.Described circuit board under test comprises: a plurality of functional modules, a plurality of shielding casing, and a plurality of connector.Wherein, described a plurality of functional module is configured on described circuit board under test.Described a plurality of shielding casing lays respectively on described a plurality of functional module to cover corresponding functional module.Described a plurality of connector has the connection iron-clad separately.Described control panel comprises: a plurality of switches and a control chip.Wherein, the part of described a plurality of switches is coupled between described a plurality of shielding casing and a system earth separately, and rest switch is coupled between the connection iron-clad and described system earth of described a plurality of connectors separately.Described control chip couples described a plurality of switch, the first in order to react on one first certificate parameter in the described a plurality of switches of conducting.Described parameter feed end couples described control chip, in order to provide described the first certificate parameter to described control chip.
In an one exemplary embodiment of the present invention, described control chip is the second portion in the described a plurality of switches of conducting in order to react on one second certificate parameter also.With this understanding, described parameter feed end is also in order to provide described the second certificate parameter to described control chip.
In an one exemplary embodiment of the present invention, each switch also chip one correspondence anti-interference electronic protection element and be coupled to corresponding shielding casing or connect iron-clad.
In an one exemplary embodiment of the present invention, described anti-interference electronic protection element can be a diode or a magnetic bead.
Another one exemplary embodiment of the present invention provides a kind of method of testing that is associated with Safety Approval, it comprises: when wish is carried out one first test to a circuit board under test, according to one first certificate parameter, and lay respectively at and connect to a system earth in order to the second portion that is connected iron-clad of a plurality of connectors on a first of the shielding casing on a plurality of functional modules of covering described circuit board under test and described circuit board under test a plurality of; And when wish is carried out one second test to described circuit board under test, according to one second certificate parameter, and a third part of described a plurality of shielding casings is connected to described system earth with one the 4th part that is connected iron-clad of described a plurality of connectors.
In an one exemplary embodiment of the invention described above, described the first certificate parameter corresponds to one first test, and described the first test is an electromagnetic interference (EMI) (EMI) test.
In an one exemplary embodiment of the invention described above, described the second certificate parameter corresponds to one second test, and described the second test is a static discharge (ESD) test.
In an one exemplary embodiment of the invention described above, described the first certificate parameter is set up after allowing described circuit board under test by the electromagnetic interference (EMI) Safety Approval via described Electromagnetic Interference Test repeatedly.
In an one exemplary embodiment of the invention described above, described the second certificate parameter is set up after allowing described circuit board under test by the static discharge Safety Approval via described electrostatic discharge testing repeatedly.
In an one exemplary embodiment of the invention described above, described a plurality of functional modules comprise at least: a 3G communication module; One WiFi communication module; An and Anneta module.
In an one exemplary embodiment of the invention described above, described a plurality of connectors comprise at least: a USB (universal serial bus) (USB) connector; And miniature secure digital (MicroSD) connector.
Based on above-mentioned, due to the shielding casing on some functional module of circuit board under test and some connector be connected iron-clad when carrying out electromagnetic interference (EMI) (EMI) test or static discharge (ESD) test, especially easily absorb the external interference source and sentence the electronic component that destroys on circuit board under test to system earth.So, the test macro that is associated with Safety Approval that the present invention carries and method thereof are mainly that prior foundation can allow circuit board under test pass through two groups of certificate parameters of electromagnetic interference (EMI) Safety Approval and static discharge Safety Approval, use when circuit board under test being carried out the test of electromagnetic interference (EMI) (EMI) test or static discharge (ESD), the iron-clad that is connected with the shielding casing on some functional module of circuit board under test and some connector is in due course and connects or do not connect to system earth according to this.Thus, can guarantee that not only circuit board under test can pass through Safety Approval, but also can avoid the electronic component on circuit board under test avoid being subject to the impact of electromagnetic interference (EMI) (EMI) test or static discharge (ESD) test and damage.
Will be appreciated that, above-mentioned general description and following embodiment are only exemplary and illustrative, and it can not limit the scope that institute of the present invention wish is advocated.
Description of drawings
Below accompanying drawing be the part of instructions of the present invention, shown example embodiment of the present invention, principle of the present invention is described together with the description of accompanying drawing and instructions.
Fig. 1 is shown as the test macro that is associated with Safety Approval 10 schematic diagram of the present invention's one one exemplary embodiment.
Fig. 2 is shown as the circuit board under test (PCB under test) 101 of Fig. 1 and the connection diagram between control panel (control board) 103.
Fig. 3 is shown as the method for testing process flow diagram that is associated with Safety Approval of the present invention's one one exemplary embodiment.
Reference numeral:
10: the test macro that is associated with Safety Approval
101: circuit board under test
103: control panel
105: the parameter feed end
MCU: control chip
The 3G-M:3G communication module
The WiFi-M:WiFi communication module
AN: Anneta module
U-C: USB (universal serial bus) (USB) connector
M-C: miniature secure digital (MicroSD) connector
201: the 3G communication module on circuit board under test cover (iron) housing
203: the WiFi communication module on circuit board under test cover (iron) housing
205: the Anneta module on circuit board under test cover (iron) housing
207: the connection iron-clad of the USB (universal serial bus) on circuit board under test (USB) connector
209: the connection iron-clad of the miniature secure digital on circuit board under test (MicroSD) connector
SW1～SW5: switch
E1～E5: anti-interference electronic protection element
P1, P2: certificate parameter
SGND: system earth
S301～S305: each step of method of testing process flow diagram that is associated with Safety Approval of the present invention's one one exemplary embodiment
Embodiment
Now will in detail with reference to one exemplary embodiment of the present invention, the example of described one exemplary embodiment be described in the accompanying drawings.In addition, all possibility parts use the element/member of same numeral to represent identical or similar portions in drawings and the embodiments.
Fig. 1 is shown as the test macro that is associated with Safety Approval 10 schematic diagram of the present invention's one one exemplary embodiment, and Fig. 2 is shown as the circuit board under test (PCB under test) 101 of Fig. 1 and the connection diagram between control panel (control board) 103.Please merge with reference to Fig. 1 and Fig. 2, the test macro 10 that is associated with Safety Approval can comprise: circuit board under test 101, control panel 103, and parameter feed end (parameter supply terminal) 105.
In this one exemplary embodiment, circuit board under test 101 comprises a plurality of functional module (function module that are configured on circuit board under test 101 at least, for example: 3G communication module 3G-M, WiFi communication module WiFi-M, Anneta module AN, but be not restricted to this); A plurality ofly lay respectively at that functional module 3G-M, WiFi-M, AN are upper covers (iron) housing (shield case) 201,203,205 with what cover corresponding functional module 3G-M, WiFi-M, AN; And a plurality of connector (connector, for example: USB (universal serial bus) (USB) connector U-C and miniature secure digital (MicroSD) connector M-C, but be not restricted to this), and USB (universal serial bus) (USB) connector U-C has the iron-clad of connection (that is connector exposes the metal position that is connected with other electronic installation/product) 207,209 separately with miniature secure digital (MicroSD) connector M-C.
In addition, control panel 103 comprises a plurality of switch SW 1～SW5, a plurality of anti-interference electronic protection element E1～E5 at least, and control chip (control chip) MCU.Wherein, the part of switch SW 1～SW5 (namely, switch SW 1～SW3) be coupled to separately shielding casing 201,203,205 and system earth (system ground) SGND between, and rest switch (that is, switch SW 4, SW5) be coupled to separately connect iron-clad 207,209 and system earth SGND between.Control chip MCU couples switch SW 1～SW5, and the first in order to react on the first certificate parameter P1 in actuating switch SW1～SW5 (that is: a certain conducting combination of switch SW 1～SW5); Perhaps, and the second portion in order to react on the second certificate parameter P2 in actuating switch SW1～SW5 (that is: another conducting combination of switch SW 1～SW5, it may be different from the conducting combination of the switch SW 1～SW5 of aforementioned first).
In this one exemplary embodiment; each switch SW 1～SW5 can also anti-interference electronic protection element E1～E5 corresponding to chip (be for example diode (diode) or magnetic bead (bead); but be not restricted to this) and be coupled to corresponding shielding casing 201,203,205 or connect iron-clad 207,209; and the main application of anti-interference electronic protection element E1～E5 has two; one is filtered noise, and another is protection switch SW1～SW5.
Moreover parameter feed end 105 couples control chip MCU, in order to provide the first certificate parameter P1 or the second certificate parameter P2 to control chip MCU.In this one exemplary embodiment, parameter feed end 105 can be computer installation, but is not restricted to this.And the first certificate parameter P1 corresponds to the first test, for example for being associated with electromagnetic interference (EMI) (EMI) test of circuit board under test 101.In addition, the second certificate parameter P2 corresponds to the second test, for example for being associated with static discharge (ESD) test of circuit board under test 101.
In this one exemplary embodiment, the first certificate parameter P1 that parameter feed end 105 provides sets up after allowing circuit board under test 101 by the electromagnetic interference (EMI) Safety Approval via Electromagnetic Interference Test repeatedly.Similarly, the second certificate parameter P2 of providing of parameter feed end 105 also sets up after allowing circuit board under test 101 by the static discharge Safety Approval via electrostatic discharge testing repeatedly.
The base this, when circuit board under test 101 is carried out Electromagnetic Interference Test or electrostatic discharge testing, as long as respectively according to these two groups of certificate parameter P1, P2 with circuit board under test 101 some/shielding casing 201,203 on partial function module 3G-M, WiFi-M, AN, 205 with some/iron-clad 207,209 that is connected of part connector U-C, M-C is in due course and connects or do not connect to system earth SGND, just can guarantee that circuit board under test 101 can be by the Safety Approval of electromagnetic interference (EMI) and static discharge.
Certainly, with a series of other circuit board under test that are similar to circuit board under test 101, can according to these two groups of certificate parameter P1, P2 with it some/shielding casing on the partial function module with some/iron-clad that is connected of part connector is in due course and connects or do not connect to system earth SGND, by this can be together with guarantee can both be by the Safety Approval of electromagnetic interference (EMI) and static discharge with a series of other circuit board under test that are similar to circuit board under test 101.
Even, other the serial circuit board under test that is different from circuit board under test 101, also can be by the mode that changes the certificate parameter that parameter feed end 105 provides, with when electromagnetic interference (EMI) (EMI) test or static discharge (ESD) test, cause some/shielding casing on the partial function module with some/iron-clad that is connected of part connector is in due course and connects or do not connect to system earth SGND, other the serial circuit board under test that still can guarantee by this to be different from circuit board under test 101 can both be by the Safety Approval of electromagnetic interference (EMI) and static discharge.Apparently, change according to actual testing requirement (that is, the attribute of circuit board under test) certificate parameter that parameter feed end 105 provides, can allow the circuit board under test of different series be applied in the middle of the test macro 10 of this one exemplary embodiment.Certainly, the certificate parameter that corresponds to other the serial circuit board under test that is different from circuit board under test 101 still need be set up after allowing circuit board under test 101 by electromagnetic interference (EMI)/static discharge Safety Approval via electromagnetic interference (EMI)/electrostatic discharge testing repeatedly.
Disclose/content of teaching based on above-mentioned one exemplary embodiment, Fig. 3 is shown as the method for testing process flow diagram that is associated with Safety Approval of the present invention's one one exemplary embodiment.Please refer to Fig. 3, the method for testing that is associated with Safety Approval of this one exemplary embodiment comprises:
The decision wish is carried out the first test (for example: electromagnetic interference (EMI) (EMI) is tested) or the second test (for example: static discharge (ESD) is tested) (step S301) to circuit board under test;
When wish is carried out the first test to circuit board under test, according to the first certificate parameter, and lay respectively at and in order to the first of the shielding casing on a plurality of functional modules of covering circuit board under test (such as 3G communication module, WiFi communication module, Anneta module etc.) and a plurality of connectors on circuit board under test (for example: USB (universal serial bus) (USB) connector, miniature secure digital (MicroSD) connector a plurality of ... Deng) the second portion of connection iron-clad connect to system earth (step S303); And
When wish is carried out the second test to circuit board under test, according to the second certificate parameter, and with a plurality of functional modules of circuit board under test (for example: 3G communication module, WiFi communication module, Anneta module ... Deng) on the third part of shielding casing and a plurality of connectors on circuit board under test (for example: USB (universal serial bus) (USB) connector, miniature secure digital (MicroSD) connector ... Deng) the 4th part of connection iron-clad connect to system earth (step S305).
In this one exemplary embodiment, described first and third part can be different, and described second portion and the 4th part can be different, but are not restricted to this.And described first and second part is to determine according to the first certificate parameter.In addition, the described the 3rd and the 4th part is to determine according to the second certificate parameter.
Clearer, the first certificate parameter is to allow the circuit board under test can be by setting up after the electromagnetic interference (EMI) Safety Approval via repeatedly Electromagnetic Interference Test.Similarly, the second certificate parameter also needs via repeatedly electrostatic discharge testing to allow the circuit board under test can be by setting up after the static discharge Safety Approval.
The base this, when circuit board under test is carried out Electromagnetic Interference Test or electrostatic discharge testing, as long as respectively according to these two groups of certificate parameters with circuit board under test some/shielding casing on the partial function module with some/iron-clad that is connected of part connector is in due course and connects or do not connect to system earth, just can guarantee that circuit board under test can be by the Safety Approval of electromagnetic interference (EMI) and static discharge.
Certainly, with a series of circuit board under test, can according to these two groups of certificate parameters with it some/shielding casing on the partial function module with some/iron-clad that is connected of part connector is in due course and connects or do not connect to system earth, by this can be together with guarantee can both be by the Safety Approval of electromagnetic interference (EMI) and static discharge with a series of circuit board under test.
Even, other serial circuit board under test also can be by the mode that changes certificate parameter, with when Electromagnetic Interference Test or the electrostatic discharge testing, cause some/shielding casing on the partial function module with some/iron-clad that is connected of part connector is in due course and connects or do not connect to system earth, can guarantee still that by this other serial circuit board under test also can be by the Safety Approval of electromagnetic interference (EMI) and static discharge.Apparently, change the practice of certificate parameter according to actual testing requirement (that is, the attribute of circuit board under test), can allow the circuit board under test of different series be applied in the middle of the method for testing of this one exemplary embodiment.Certainly, the certificate parameter that corresponds to the circuit board under test of arbitrary attribute still needs via repeatedly electromagnetic interference (EMI)/electrostatic discharge testing to allow it can be by setting up after electromagnetic interference (EMI)/static discharge Safety Approval.
Accordingly, due to the shielding casing on some functional module of circuit board under test and some connector be connected iron-clad when carrying out electromagnetic interference (EMI) (EMI) test or static discharge (ESD) test, especially easily absorb the external interference source and sentence the electronic component that destroys on circuit board under test to system earth.So, the test macro that is associated with Safety Approval that the present invention carries and method thereof are mainly that prior foundation can allow circuit board under test pass through two groups of certificate parameters of electromagnetic interference (EMI) Safety Approval and static discharge Safety Approval, use when circuit board under test being carried out the test of electromagnetic interference (EMI) (EMI) test or static discharge (ESD), the iron-clad that is connected with the shielding casing on some functional module of circuit board under test and some connector is in due course and connects or do not connect to system earth according to this.Thus, can guarantee that not only circuit board under test can pass through Safety Approval, but also can avoid the electronic component on circuit board under test avoid being subject to the impact of electromagnetic interference (EMI) (EMI) test or static discharge (ESD) test and damage.
In addition, although above-mentioned one exemplary embodiment is to describe as an example of independent electromagnetic interference (EMI) (EMI) test or static discharge (ESD) test example, the present invention is not restricted to this.Clearer; the test macro that the present invention carries and method thereof also can be applied in and be associated with the test that circuit board under test is assembled the integral product of completing; as long as after the certificate parameter decision with correspondence; can allow be associated with circuit board under test and assemble the integral product completed by more high-grade Safety Approval, and the one exemplary embodiment of these modification also belong to institute of the present invention wish protection the technology category it
Although the present invention discloses as above with embodiment, so it is not to limit the present invention, and any person of an ordinary skill in the technical field when can do a little change and retouching, and does not break away from the spirit and scope of the present invention.In addition, arbitrary embodiment of the present invention or claim must not reached disclosed whole purposes or advantage or characteristics.In addition, summary part and title are only the use of auxiliary patent document search, are not to limit interest field of the present invention.
Claims (17)
1. test macro that is associated with Safety Approval comprises:
One circuit board under test comprises:
A plurality of functional modules are configured on this circuit board under test;
A plurality of shielding casings lay respectively on those functional modules to cover corresponding functional module; And
A plurality of connectors have separately one and connect iron-clad;
One control panel comprises:
A plurality of switches, the part of those switches are coupled between those shielding casings and a system earth separately, and rest switch is coupled to separately those and connects between iron-clad and this system earth; And
One control chip couples those switches, the first in order to react on one first certificate parameter in those switches of conducting; And
One parameter feed end couples this control chip, in order to provide this first certificate parameter to this control chip.
2. the test macro that is associated with Safety Approval according to claim 1, wherein this control chip second portion in those switches of conducting in order to react on one second certificate parameter also.
3. the test macro that is associated with Safety Approval according to claim 2, wherein this parameter feed end is also in order to provide this second certificate parameter to this control chip.
4. the test macro that is associated with Safety Approval according to claim 2, wherein this first certificate parameter corresponds to one first test, and this first test is an Electromagnetic Interference Test.
5. the test macro that is associated with Safety Approval according to claim 4, wherein this second certificate parameter corresponds to one second test, and this second test is an electrostatic discharge testing.
6. the test macro that is associated with Safety Approval according to claim 5, wherein this first certificate parameter is set up after allowing this circuit board under test by the electromagnetic interference (EMI) Safety Approval via this Electromagnetic Interference Test repeatedly.
7. the test macro that is associated with Safety Approval according to claim 5, wherein this second certificate parameter is set up after allowing this circuit board under test by the static discharge Safety Approval via this electrostatic discharge testing repeatedly.
8. the test macro that is associated with Safety Approval according to claim 1, wherein each those switch also chip one correspondence anti-interference electronic protection element and be coupled to corresponding shielding casing or connect iron-clad.
9. the test macro that is associated with Safety Approval according to claim 8, wherein this anti-interference electronic protection element is a diode or a magnetic bead.
10. the test macro that is associated with Safety Approval according to claim 1, wherein those functional modules comprise at least:
One 3G communication module;
One WiFi communication module; And
One Anneta module.
11. the test macro that is associated with Safety Approval according to claim 1, wherein those connectors comprise at least:
One universal serial bus connector; And
One miniature secure digital connector.
12. a method of testing that is associated with Safety Approval comprises:
When wish is carried out one first test to a circuit board under test, according to one first certificate parameter, and lay respectively at and connect to a system earth in order to the second portion that is connected iron-clad of a plurality of connectors on a first of the shielding casing on a plurality of functional modules of covering this circuit board under test and this circuit board under test a plurality of; And
When wish is carried out one second test to this circuit board under test, according to one second certificate parameter, and a third part of those shielding casings is connected to this system earth with one the 4th part that is connected iron-clad of those connectors.
13. the method for testing that is associated with Safety Approval according to claim 12, wherein this first test is an Electromagnetic Interference Test, and this second test is an electrostatic discharge testing.
14. the method for testing that is associated with Safety Approval according to claim 13, wherein this first certificate parameter is set up after allowing this circuit board under test by the electromagnetic interference (EMI) Safety Approval via this Electromagnetic Interference Test repeatedly.
15. the test macro that is associated with Safety Approval according to claim 13, wherein this second certificate parameter is set up after allowing this circuit board under test by the static discharge Safety Approval via this electrostatic discharge testing repeatedly.
16. the method for testing that is associated with Safety Approval according to claim 12, wherein those functional modules comprise at least:
One 3G communication module;
One WiFi communication module; And
One Anneta module.
17. the method for testing that is associated with Safety Approval according to claim 12, wherein those connectors comprise at least:
One universal serial bus connector; And
One miniature secure digital connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110378125.4A CN103135002B (en) | 2011-11-24 | 2011-11-24 | Be associated with test macro and the method thereof of the Safety Approval of electromagnetic interference (EMI) and static discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110378125.4A CN103135002B (en) | 2011-11-24 | 2011-11-24 | Be associated with test macro and the method thereof of the Safety Approval of electromagnetic interference (EMI) and static discharge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103135002A true CN103135002A (en) | 2013-06-05 |
| CN103135002B CN103135002B (en) | 2015-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110378125.4A Expired - Fee Related CN103135002B (en) | 2011-11-24 | 2011-11-24 | Be associated with test macro and the method thereof of the Safety Approval of electromagnetic interference (EMI) and static discharge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125887A (en) * | 2021-04-20 | 2021-07-16 | 北京汽车集团越野车有限公司 | Method and device for verifying ESD performance of automobile electrical part |
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| TW200941019A (en) * | 2008-03-21 | 2009-10-01 | Hon Hai Prec Ind Co Ltd | Electro magnetic interference detection device |
| CN101793923A (en) * | 2009-11-03 | 2010-08-04 | 福建星网锐捷网络有限公司 | Electrostatic discharge test device, system and method |
| CN102116815A (en) * | 2010-12-30 | 2011-07-06 | 优利德科技(中国)有限公司 | Safety test system |
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| US20050176376A1 (en) * | 2004-02-11 | 2005-08-11 | Accton Technology Corporation | Batch testing system and method for wireless communication devices |
| CN101122621A (en) * | 2006-08-10 | 2008-02-13 | 华硕电脑股份有限公司 | Electrostatic discharge detection device and method |
| TW200941019A (en) * | 2008-03-21 | 2009-10-01 | Hon Hai Prec Ind Co Ltd | Electro magnetic interference detection device |
| CN101793923A (en) * | 2009-11-03 | 2010-08-04 | 福建星网锐捷网络有限公司 | Electrostatic discharge test device, system and method |
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| CN113125887A (en) * | 2021-04-20 | 2021-07-16 | 北京汽车集团越野车有限公司 | Method and device for verifying ESD performance of automobile electrical part |
| CN113125887B (en) * | 2021-04-20 | 2023-12-22 | 北京汽车集团越野车有限公司 | Method and device for verifying ESD performance of automobile electrical appliance part |
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| Publication number | Publication date |
|---|---|
| CN103135002B (en) | 2015-10-14 |
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Granted publication date: 20151014 Termination date: 20161124 |