CN113125326A - Carbon paper IP air permeability test tool for fuel cell - Google Patents
Carbon paper IP air permeability test tool for fuel cell Download PDFInfo
- Publication number
- CN113125326A CN113125326A CN202110515057.5A CN202110515057A CN113125326A CN 113125326 A CN113125326 A CN 113125326A CN 202110515057 A CN202110515057 A CN 202110515057A CN 113125326 A CN113125326 A CN 113125326A
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- carbon paper
- fuel cell
- upper cover
- air permeability
- cover plate
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 88
- 238000012360 testing method Methods 0.000 title claims abstract description 49
- 230000035699 permeability Effects 0.000 title claims abstract description 27
- 239000000446 fuel Substances 0.000 title claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 238000010030 laminating Methods 0.000 claims abstract description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000741 silica gel Substances 0.000 claims description 6
- 229910002027 silica gel Inorganic materials 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 3
- 239000012945 sealing adhesive Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 210000003437 trachea Anatomy 0.000 claims 3
- 239000000853 adhesive Substances 0.000 claims 2
- 230000001070 adhesive effect Effects 0.000 claims 2
- 230000008676 import Effects 0.000 claims 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000004927 clay Substances 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 3
- 239000001257 hydrogen Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 12
- 230000006835 compression Effects 0.000 description 11
- 238000007906 compression Methods 0.000 description 11
- 238000003825 pressing Methods 0.000 description 7
- 238000009423 ventilation Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000013521 mastic Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fuel Cell (AREA)
Abstract
The invention relates to a carbon paper IP (Internet protocol) permeability testing tool for a fuel cell, which comprises a lower bottom plate, an upper cover plate, two side plates and a clearance gauge, wherein the center of the top surface of the lower bottom plate is a carbon paper placing surface, two lower vent grooves are arranged on two sides of the carbon paper placing surface, the outermost two sides of the top surface of the lower bottom plate are clearance gauge placing surfaces, the center of the bottom plate of the upper cover plate is a carbon paper laminating surface, two upper vent grooves are arranged on two sides of the carbon paper laminating surface, the outermost two sides of the top surface of the lower bottom plate are clearance gauge laminating surfaces, the lower bottom plate and the upper cover plate are folded up and down to form a laminating module, the upper vent grooves and the lower vent grooves are folded to form two vent pipe holes, a sealing unit is arranged between gaps close to the clearance gauge sides, the two side plates are respectively and hermetically arranged on two. Compared with the prior art, the method realizes the direct test of the IP air permeability of the carbon paper, has simple and convenient operation, and is convenient for the design and selection of the subsequent hydrogen fuel cell.
Description
Technical Field
The invention relates to the field of fuel cell design test, in particular to a carbon paper IP air permeability test tool for a fuel cell.
Background
In the design stage of the hydrogen fuel cell, the selection of membrane electrode carbon paper is very important, wherein one key factor of the selection is the IP (In Plane) air permeability of the carbon paper, and the parameter is used for representing the performance of the carbon paper and can be used for evaluating the air permeability of the carbon paper. The adoption of the carbon paper with good air permeability can obviously improve the water drainage under the ridge of the fuel cell, accelerate mass transfer and improve the performance of the cell. At present, the selection of membrane electrode carbon paper is usually selected by experience, and then actual performance tests are carried out in the fuel cell, so that the design cost is high, and the period is long. Therefore, the market lacks a device capable of directly testing the IP air permeability of the membrane electrode carbon paper.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a carbon paper IP air permeability testing tool for a fuel cell.
The purpose of the invention can be realized by the following technical scheme:
a carbon paper IP air permeability test tool for a fuel cell comprises a lower bottom plate, an upper cover plate, two side plates and a feeler gauge, wherein the center of the top surface of the lower bottom plate is a carbon paper placing surface, two lower vent grooves are arranged on two sides of the carbon paper placing surface, the outermost two sides of the top surface of the lower bottom plate are feeler gauge placing surfaces, the center of the bottom plate of the upper cover plate is a carbon paper laminating surface, two upper vent grooves are arranged on two sides of the carbon paper laminating surface, the outermost two sides of the top surface of the lower bottom plate are feeler gauge laminating surfaces, the lower bottom plate and the upper cover plate are folded up and down to form a laminating module, test carbon paper is clamped between the carbon paper placing surface and the carbon paper laminating surface, the feeler gauge is clamped between the feeler gauge placing surface and the feeler gauge laminating surface, the upper vent grooves and the lower vent grooves are folded to form two vent pipe holes, two sides of each vent pipe hole form two gaps due to the upper cover plate and the lower cover plate, a sealing unit is, the two side plates are respectively and hermetically arranged at two sides of the pressing module, each side plate is provided with a gas inlet and outlet, and the gas inlet and outlet are aligned and connected with two ends of the gas pipe hole.
Further, the test carbon paper completely covers the carbon paper mounting surface.
Further, the feeler gauge is a metal sheet, and the thickness of the feeler gauge is smaller than that of the test carbon paper.
Further, the sealing unit includes a sealing mastic or a sealing tape covering the gap.
Further, the sealing unit also comprises a silica gel pad, and the silica gel pad is clamped between the gaps.
Furthermore, the lower base plate is provided with a bolt hole, the upper cover plate is provided with a through hole, and the upper cover plate and the lower base plate are fixed by a bolt penetrating through the through hole and connecting the bolt hole.
Furthermore, the lower base plate and the upper cover plate are respectively provided with a pin hole corresponding to the position, and the upper cover plate and the lower base plate are fixed in position by penetrating through the two pin holes through pins.
Furthermore, a sticky soft rubber pad is arranged between the side plate and the pressing module, and the side plate is attached to the pressing module through the sticky soft rubber pad.
Furthermore, two ends of one ventilation pipe hole are respectively connected with the pressure reducing valve and the first pressure gauge through a gas inlet and outlet, and two ends of the other ventilation pipe hole are respectively connected with the mass flow meter and the second pressure gauge through a gas inlet and outlet.
Further, the carbon paper placing surface is 0.2-0.3 mm higher than the clearance gauge placing surface.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the testing tool with a simple structure is formed by the lower bottom plate, the upper cover plate, the two side plates and the feeler gauge, so that the direct test of the IP air permeability of the carbon paper is realized, the operation is simple and convenient, the carbon paper is only clamped between the lower bottom plate and the upper cover plate when the testing tool is used, and then the testing can be carried out through the sealing of the side plates, so that the subsequent design and selection of the hydrogen fuel cell are facilitated, the design cost is effectively reduced, and the research and development period is shortened. Meanwhile, the compression ratio of the carbon paper can be changed by selecting the feelers with different thicknesses, so that the IP air permeability test of the carbon paper under different compression ratios is realized, and the applicability is good.
2. The ventilation pipe hole is internally sealed by sealing plaster or sealing adhesive tape, so that the operation is easy, the repeated use can be realized, and the test repeatability requirement is met. And the use of the silica gel pad can further improve the sealing performance.
3. The upper cover plate and the lower base plate are connected through the bolts, so that the stability of the testing process is ensured, the assembling force is more uniform, and the carbon paper compression rate and the sealing are more easily ensured. Meanwhile, the invention can carry out primary positioning through the pin hole and the pin, and then the operation difficulty is reduced through the bolt connection.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of the explosive structure of the present invention.
Fig. 3 is a schematic structural diagram of the lamination module.
FIG. 4 is a schematic diagram of the testing principle of the present invention.
Reference numerals: 1. the carbon paper testing device comprises a lower bottom plate, 11, a carbon paper placing surface, 12, a lower vent groove, 13, a clearance gauge placing surface, 14, bolt holes, 15, side bolt holes, 2, an upper cover plate, 21, a carbon paper laminating surface, 22, an upper vent groove, 23, a clearance gauge laminating surface, 24, through holes, 25, pin holes, 3, side plates, 31, gas inlet and outlet, 32, side through holes, 4, a clearance gauge, 5, testing carbon paper, 6, a sealing unit, 7, pin holes, 8, a sticky soft rubber pad, 91, a pressure reducing valve, 92, a mass flowmeter, 100, a laminating module, 200 and a gas through pipe hole.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1 to fig. 3, the present embodiment provides a carbon paper IP air permeability testing tool for a fuel cell, which includes a lower bottom plate 1, an upper cover plate 2, two side plates 3 and a feeler gauge 4. The center of the top surface of the lower bottom plate 1 is a carbon paper placing surface 11, two lower vent grooves 12 are arranged on two sides of the carbon paper placing surface 11, and two clearance gauge placing surfaces 13 are arranged on two outer sides of the two lower vent grooves 12. The center of the bottom plate of the upper cover plate 2 is a carbon paper laminating surface 21, two sides of the carbon paper laminating surface 21 are provided with two upper vent grooves 22, and two sides of the outer parts of the two upper vent grooves 22 are clearance gauge laminating surfaces 23. When the carbon paper testing device is used, the lower bottom plate 1 and the upper cover plate 2 are folded up and down to form the pressing module 100, the testing carbon paper 5 is clamped between the carbon paper placing surface 11 and the carbon paper pressing surface 21, and the feeler 4 is clamped between the feeler placing surface 13 and the feeler pressing surface 23. The upper vent slot 22 and the lower vent slot 12 close to form two vent holes 200. The two side plates 3 are respectively and hermetically mounted on two sides of the lamination module 100, two gas inlets and outlets 31 are arranged on each side plate 3, and the gas inlets and outlets 31 are aligned and connected with two ends of the gas pipe holes 200.
In this embodiment, since the vent hole 200 is formed by the upper vent groove 22 and the lower vent groove 12 being closed, and the carbon paper and the feeler 4 are sandwiched between the upper cover plate 2 and the lower base plate 1, there is a gap between both sides of the vent hole 200. Wherein the gap near the test carbon paper 5 is the gas flow hole of the test carbon paper 5, and the gap near the side of the feeler 4 is sealed by the sealing unit 6. The sealing unit 6 may use sealing mastic or sealing tape, and in the present embodiment, sealing tape is preferably used. The sealing unit 6 may further include a silicone pad, and the sealing performance is further improved in the silicone pad clamping gap.
In this embodiment, the upper cover plate 2 and the lower base plate 1 are connected by bolts, specifically: the lower base plate 1 is provided with bolt holes 14, the upper cover plate 2 is provided with through holes 24, and the upper cover plate 2 and the lower base plate 1 are fixed by connecting the bolt holes 14 through bolts penetrating through the through holes 24. The bolt connection mode makes the assembly force more even, and guarantees carbon paper compression ratio and sealed more easily. The lower bottom plate 1 and the upper cover plate 2 can be provided with pin holes 7 corresponding to the positions. During the use, upper cover plate 2 and lower plate 1 pass two pinhole 7 through the pin and carry out preliminary rigidity, then screw up the bolt and compress test carbon paper 5, improve the operation convenience.
In this embodiment, a total of four feelers 4 are provided between the lower base plate 1 and the upper cover plate 2, two on each side. The feeler 4 is a strip-shaped metal sheet, and the thickness of the feeler is smaller than that of the test carbon paper 5. In use, the compression rate of the carbon paper 5 is ensured by selecting a feeler 4 with proper thickness. Half of the feeler 4 can be clamped, and the other half of the feeler can be extended out and suspended from the two ends of the pressing module 100, so that the position can be adjusted conveniently. Since the test carbon paper 5 requires a pre-compression during the installation, the carbon paper placing surface 11 may be higher than the feeler placing surface 13, generally 0.2-0.3 mm, preferably 0.2 mm.
In this embodiment, a sticky soft rubber mat 8 is disposed between the side plate 3 and the press-fit module 100, and the sticky soft rubber mat 8 covers the whole side plate 3, so that the side plate 3 is attached to the press-fit module 100 through the sticky soft rubber mat 8. The sticky soft rubber pad 8 can be a common 3M transparent soft rubber belt which loses stickiness after being heated, and can be reused. In another embodiment, the side bolt holes 15 are also formed on both sides of the compression module 100, the side plate 3 is also provided with the side through hole 32, and the side plate 3 and the compression module 100 are further fixed by the side bolts passing through the side through hole 32 and the side bolt holes 15, so as to ensure the air tightness of the tool.
The test method applied in this example is as follows:
the first step is as follows: and cutting the carbon paper with the length and the width larger than the carbon paper placing surface 11. A test sample of the test carbon paper 5 is placed on the carbon paper placing surface 11 of the lower plate 1. A feeler 4 corresponding to the thickness at compression rate is placed on the feeler-placing surface 13. The compression ratio of the carbon paper is controlled by using feelers 4 of different thicknesses.
The second step is that: the upper cover plate 2 is pressed on the lower base plate 1, the pin penetrates through the pin hole 7 to be preliminarily positioned and fixed, a silica gel pad and a sealing adhesive tape are arranged in an outer layer gap of the formed vent pipe hole 200 to be sealed, then the bolt penetrates through the hole to be fastened and fixed, and the feeler gauge 4 is guaranteed to be pressed tightly. The excess surfaces around the side carbon paper are cut off, so that the test carbon paper 5 completely covers and aligns with the carbon paper placing surface 11.
The third step: the 3M transparent soft rubber pad is cut into bolt holes 14 and air holes and then is attached to the two side plates 3. The sealing faces of the compression module 100 are then aligned and bolted diagonally.
The fourth step: after the assembly of the tool is completed, the pressure reducing valve 91, the mass flow meter 92 and the air source are connected for leak detection. As shown in fig. 4, two ends of one ventilation pipe 200 are respectively connected with a pressure reducing valve 91 and a first pressure gauge P1, two ends of the other ventilation pipe 200 are respectively connected with a mass flow meter 92 and a second pressure gauge P2, and the pressure reducing valve 91 is connected with an air source.
And a sixth step: confirming leakage amount after leakage detection<0.5%, and performing IP air permeability test. The air flow enters one ventilation pipe hole 200 (inlet side cavity) through the pressure reducing valve 91, then diffuses through the test carbon paper 5 to enter the other ventilation pipe hole 200 (outlet side cavity), and finally flows out through the mass flow meter 92. Collecting inlet side pressure P under different flow in the processINAnd outlet side pressure POUT. And (3) calculating the permeability K value in the IP direction according to a formula, wherein the calculation expression is as follows:
wherein, PINI.e. the inlet side pressure, POUTNamely, the pressure is measured at the outlet, L is the length of the carbon paper placing surface 11, R is an ideal gas constant, T is the ambient temperature, MWAIRIs the molar mass of air, μ is the aerodynamic viscosity, K is the permeability, m' is the mass flux kg/m2s through the test carbon paper 5, and β is the coefficient of inertia.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. The carbon paper IP air permeability testing tool for the fuel cell is characterized by comprising a lower bottom plate (1), an upper cover plate (2), two side plates (3) and a feeler gauge (4), wherein the center of the top surface of the lower bottom plate (1) is a carbon paper placing surface (11), two lower vent grooves (12) are arranged on two sides of the carbon paper placing surface (11), the outermost two sides of the top surface of the lower bottom plate (1) are feeler gauge placing surfaces (13), the center of the bottom plate of the upper cover plate (2) is a carbon paper laminating surface (21), two upper vent grooves (22) are arranged on two sides of the carbon paper laminating surface (21), the outermost two sides of the top surface of the lower bottom plate (1) are feeler gauge laminating surfaces (23), the lower bottom plate (1) and the upper cover plate (2) are folded up and down to form a laminating module (100), a testing carbon paper (5) is clamped between the carbon paper placing surface (11) and the carbon paper laminating surface (21), and the feeler gauge (4) is clamped between the feeler gauge placing surface (13) and the feeler gauge laminating surface (23), go up air channel (22) and lower air channel (12) and fold and form two logical trachea holes (200), the both sides of every logical trachea hole (200) are provided with sealing unit (6) because of upper cover plate (2) and lower plate (1) formation two clearances, be close to between the clearance of clearance gauge (4) side, two curb plates (3) seal installation respectively in the both sides of pressfitting module (100), are equipped with gas and import and export (31) on every curb plate (3), gas import and export (31) align the both ends of connecting logical trachea hole (200).
2. The IP air permeability test tool for the carbon paper for the fuel cell according to claim 1, wherein the test carbon paper (5) completely covers the carbon paper placing surface (11).
3. The tool for testing the IP air permeability of the carbon paper for the fuel cell is characterized in that the feeler (4) is a metal sheet, and the thickness of the feeler is smaller than that of the testing carbon paper (5).
4. The IP air permeability test tool for the carbon paper for the fuel cell is characterized in that the sealing unit (6) comprises sealing clay or sealing adhesive tape and covers the gap.
5. The tool for testing the IP air permeability of the carbon paper for the fuel cell according to claim 4, wherein the sealing unit (6) further comprises a silica gel pad, and the silica gel pad is clamped between the gaps.
6. The tool for testing the IP air permeability of the carbon paper for the fuel cell according to claim 1, wherein the lower base plate (1) is provided with bolt holes (14), the upper cover plate (2) is provided with through holes (24), and the upper cover plate (2) and the lower base plate (1) are fixed by bolts penetrating through the through holes (24) to connect the bolt holes (14).
7. The tool for testing the IP air permeability of the carbon paper for the fuel cell according to claim 6, wherein pin holes (7) corresponding to each other in position are formed in the lower base plate (1) and the upper cover plate (2), and the upper cover plate (2) and the lower base plate (1) are fixed in position by penetrating pins through the two pin holes (7).
8. The carbon paper IP air permeability test tool for the fuel cell according to claim 1, characterized in that an adhesive soft rubber pad (8) is arranged between the side plate (3) and the press-fit module (100), and the side plate (3) is attached to the press-fit module (100) through the adhesive soft rubber pad (8).
9. The carbon paper IP air permeability testing tool for the fuel cell as claimed in claim 1, wherein two ends of one air vent hole (200) are respectively connected with a pressure reducing valve (91) and a first pressure gauge through a gas inlet and outlet (31), and two ends of the other air vent hole (200) are respectively connected with a mass flow meter (92) and a second pressure gauge through the gas inlet and outlet (31).
10. The IP air permeability test tool for the carbon paper for the fuel cell according to claim 1, wherein the placing surface (11) of the carbon paper is 0.2-0.3 mm higher than the placing surface (13) of the feeler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110515057.5A CN113125326B (en) | 2021-05-12 | 2021-05-12 | Carbon paper IP air permeability test fixture for fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110515057.5A CN113125326B (en) | 2021-05-12 | 2021-05-12 | Carbon paper IP air permeability test fixture for fuel cell |
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| Publication Number | Publication Date |
|---|---|
| CN113125326A true CN113125326A (en) | 2021-07-16 |
| CN113125326B CN113125326B (en) | 2023-05-30 |
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| JP2006073263A (en) * | 2004-08-31 | 2006-03-16 | Mitsubishi Rayon Co Ltd | Gas permeability evaluation device of gas diffusion substrate for fuel cell |
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| US20140013826A1 (en) * | 2011-01-27 | 2014-01-16 | Shanghai aircraft manufacturing co ltd | Testing apparatus for testing gas permeability on thickness direction of plastic matrix |
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2021
- 2021-05-12 CN CN202110515057.5A patent/CN113125326B/en active Active
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| CN113125326B (en) | 2023-05-30 |
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