CN218271912U - A testing arrangement for detecting film leaks gluey nature - Google Patents
A testing arrangement for detecting film leaks gluey nature Download PDFInfo
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- CN218271912U CN218271912U CN202222234292.8U CN202222234292U CN218271912U CN 218271912 U CN218271912 U CN 218271912U CN 202222234292 U CN202222234292 U CN 202222234292U CN 218271912 U CN218271912 U CN 218271912U
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- 238000012360 testing method Methods 0.000 title claims abstract description 61
- 238000007789 sealing Methods 0.000 claims abstract description 80
- 239000003292 glue Substances 0.000 claims abstract description 60
- 239000010408 film Substances 0.000 claims description 112
- 239000010409 thin film Substances 0.000 claims description 10
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 10
- 238000001514 detection method Methods 0.000 abstract description 9
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 6
- 239000012528 membrane Substances 0.000 abstract description 4
- 239000012945 sealing adhesive Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 239000002131 composite material Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 238000005086 pumping Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 238000012031 short term test Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a testing arrangement for detecting film leaks gluey nature, including the mould that has the trompil, the upper surface and the lower surface of mould are provided with respectively and cover the examination of trompil examination membrane and the first sealing layer, it has ventilative felt to fill between first sealing layer and the examination membrane of examination; the film to be tested is covered with a one-way breathable layer, and glue is filled between the one-way breathable layer and the film to be tested; the upper surface of mould still is provided with the second sealing layer, first sealing layer and the second sealing layer all includes the vacuum interface. Vacuumizing the space formed by the first sealing layer and the second sealing layer and the film to be tested respectively, so that the glue covers the testing area and applies a high-pressure environment to test the chemical corrosion resistance of the film; the glue can be seeped to the breathable felt from a damaged part or a glue leakage point, so that the judgment of a detection result is realized quickly and conveniently.
Description
Technical Field
The utility model belongs to the technical field of the gas tightness test, a testing arrangement for detecting film leaks gluey nature is related to.
Background
With the rapid development of aerospace technology in China, more and more high-cost-performance composite materials are applied to the field of aerospace, and the requirements of vacuum auxiliary materials are gradually increased as indispensable consumable materials in the production process of composite material products. In the production process of composite material parts, the high-temperature-resistant and high-pressure-resistant vacuum bag film plays a very important role as a key auxiliary material in the composite material forming process, the quality of the vacuum bag film plays a role in making the composite material parts, and the vacuum bag film is particularly prominent in the aerospace field, so that the performances of airtightness (sealing property), puncture resistance, high-temperature and high-pressure resistance, corrosion resistance and the like of the vacuum bag film need to be strictly limited.
To this end, some technical schemes capable of detecting the air tightness and puncture resistance of a vacuum bag film have appeared at present, for example, CN106840538A discloses a method for detecting a vacuum bag film air leakage point by using a pressure sensitive substance, the pressure sensitive substance is added into the vacuum bag film, then the pressure difference between the inner side and the outer side of the vacuum bag film is adjusted to be larger than or equal to a critical pressure, and the observed point with unchanged color is an air leakage point, wherein the critical pressure refers to the pressure at which the pressure sensitive substance starts to change color, the pressure sensitive substance is a polymer containing spiropyran, and the polymerization degree of the polymer is not less than 5, the invention can automatically detect the self air tightness according to the change of the external pressure of the vacuum bag film, greatly save manpower and material resources, accurately and quickly find out the air leakage place, make remedial measures in time, ensure the molding pressure of a composite material member, save the production cost, improve the production efficiency, and has the advantages of industrialized popularization; CN215179542U provides a testing device for the puncture resistance of vacuum bag films, comprising: the vacuum bag film fixing device comprises an operating platform, a soft layer, a puncture mould, a vacuum bag film fixing part and a vacuumizing device; the upper surface of the operating platform is provided with a trapezoidal groove; the soft layer and the puncture mould are sequentially arranged at the bottom of the trapezoidal groove; the vacuum bag film fixing part is arranged on the upper surface of the operating platform; in the test process of the puncture resistance of the vacuum bag film, the vacuum bag film covers in trapezoidal recess top and is sealed with operation platform through vacuum bag film fixed part, evacuating device connects on the vacuum bag film and is located between trapezoidal recess edge and the vacuum bag film fixed part. The testing device has a simple structure and can be used for measuring the puncture resistance of the vacuum bag film.
However, the vacuum bag film applied to the aerospace field at present is mainly a nylon multilayer co-extrusion composite film, and certain high temperature and high pressure resistance and chemical corrosion resistance detection needs to be carried out on the film so as to prevent glue leakage points from being generated on the film and influence the quality of products, but no special equipment instrument or other technical scheme capable of realizing the detection exists.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a testing device for detecting the adhesive leakage of a film, which comprises a die with an opening, wherein the upper surface and the lower surface of the die are respectively provided with a film to be tested and a first sealing layer which cover the opening, and an air felt is filled between the first sealing layer and the film to be tested; the film to be tested is covered with a one-way breathable layer, and glue is filled between the one-way breathable layer and the film to be tested; the upper surface of mould still is provided with the second sealing layer, first sealing layer and the second sealing layer all includes the vacuum interface. Vacuumizing the space formed by the first sealing layer and the second sealing layer and the film to be tested respectively to ensure that the glue covers the testing area and applies a high-pressure environment to test the chemical corrosion resistance of the film; the glue can be seeped to the breathable felt from a damaged part or a glue leakage point, so that the judgment of a detection result is realized quickly and conveniently.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a testing arrangement for detecting film leaks gluey nature, including the mould that has the trompil, the upper surface and the lower surface of mould are provided with respectively and cover the examination of trompil is examined film and first sealing layer, it packs ventilative felt to examine between film with the first sealing layer; the outward surface of the film to be tested is covered with a one-way breathable layer, and test glue is filled between the one-way breathable layer and the film to be tested; the upper surface of the mould is also provided with a second sealing layer, and the second sealing layer covers the film to be tested and the one-way breathable layer; the edges of the first sealing layer, the film to be tested, the one-way breathable layer and the second sealing layer are sealed; the first and second sealing layers each include at least one vacuum port.
The utility model discloses a space that first sealing layer and second are sealed respectively with the film formation of awaiting measuring is carried out the evacuation, makes the test glue cover the test area and apply high pressure environment for the anti chemical corrosion ability of test film; the glue for testing can seep out of the ventilated felt from the damaged part or the glue leakage point, so that the judgment of the detection result is quickly and conveniently realized.
As a preferred technical solution of the present invention, the area of the opening accounts for 80% or more, for example, 80%, 85%, 90%, 95%, etc., of the area of the thin film to be tested.
Under the condition that the edge part of the film to be tested can be ensured to be well sealed on the surface of the die, the area of the opening is enlarged, and the effective test area is increased.
In a preferred embodiment of the present invention, the depth of the hole is 5 to 15cm, for example, 5cm, 6cm, 7cm, 8cm, 9cm, 10cm, 11cm, 12cm, 13cm, 14cm, or 15cm, but the hole is not limited to the above-mentioned values, and other values not listed in the above-mentioned value range are also applicable.
As the preferred technical scheme of the utility model, the examination membrane stretches into in the trompil in order to form and be used for accepting the sunken of examination glue that awaits measuring.
In a preferred embodiment of the present invention, the depth of the recess is 3 to 33% of the depth of the opening, for example, 3%, 6%, 9%, 12%, 15%, 18%, 21%, 24%, 27%, 30%, 33%, or the like, but is not limited to the above-mentioned values, and other values not listed in the above-mentioned range of values are also applicable.
The film to be tested can not excessively extend into the open pore because the film to be tested needs to bear the weight of the glue; and ensuring that the formed depression can bear enough glue, so that the glue is stably placed in the depression without overflowing, thereby facilitating subsequent cleaning and installation of the one-way breathable layer, and simultaneously ensuring that the glue for testing can cover all testing areas of the film to be tested in the subsequent testing process.
The glue for testing is preferably thermosetting glue, and the glue for testing has certain chemical corrosivity to the film to be tested.
In a preferred embodiment of the present invention, the thickness of the airfelt is 67% or more, for example, 67%, 70%, 73%, 76%, 79%, 82%, 85%, 88%, 91%, 94%, or 97% of the depth of the opening, but is not limited to the above-mentioned values, and other values not listed in the above-mentioned range of values are also applicable.
Ventilative felt can give the certain holding power of the examination of being equipped with glue film that awaits measuring, when glue is being leaked in the emergence simultaneously, the glue solution spreads in the ventilative felt, nevertheless because blockking of multilayer ventilative felt, the diffusion of glue solution receives the hindrance, makes it can not be by suction vacuum system, subsequent clearance of also being convenient for.
As the utility model discloses preferred technical scheme, the area more than or equal to on one-way ventilative layer the area of trompil is less than the area of examination film.
As the utility model discloses preferred technical scheme, one-way ventilative layer orientation the second sealing layer is ventilative, in order to right one-way ventilative layer with the space between the examination of awaiting measuring film is carminationed.
The area of the one-way breathable layer of the utility model is smaller than that of the film to be tested, namely, the one-way breathable layer is preferably arranged above the film to be tested, and the edge part is attached and sealed on the film to be tested, so that the method for arranging is favorable for reducing the influence of the air tightness of the one-way breathable layer on the whole device, and the test result is more accurate; particularly, during subsequent vacuumizing, the space where the glue is located is more favorably exhausted, the glue is more uniformly distributed, and the glue is more closely attached to the film to be tested; when the one-way air-permeable layer which is larger than the film to be tested in area and completely covers the film to be tested is used, even if the peripheral edges of the one-way air-permeable layer are sealed on the mold, the sealing performance of the one-way air-permeable layer and the space finally formed by the film to be tested is poor, so that incomplete air exhaust in the space can be caused, and the glue is not covered in place.
As a preferred technical solution of the present invention, the first sealing layer and the second sealing layer are vacuum bag films.
As the utility model discloses preferred technical scheme, first sealing layer the examination membrane one-way ventilative layer reaches the edge of second sealing layer all uses sealing tape to seal.
The first sealing layer and the second sealing layer of the vacuum bag film sealing device are mainly used for forming a well-sealed space between the first sealing layer and the film to be tested so as to apply a vacuum environment, so that the vacuum bag film subjected to the air tightness test can be selected as materials of the first sealing layer and the second sealing layer, the installation difficulty can be greatly reduced, and the vacuum bag film sealing device is more convenient and more favorable for reducing the cost; the person skilled in the art can make adjustments and selections according to actual situations, but should ensure that the first sealing layer and the second sealing layer have good air tightness and sealing measures are performed around the edges to provide a closed environment.
The utility model discloses following beneficial effect has at least: a testing arrangement for detecting film leaks gluey nature reasonable in design, simple structure, convenient operation, easily short-term test and observation, and the test cost is low, can accurately judge the hourglass gluey nature under the high-pressure chemical corrosion condition of the examination vacuum bag film that awaits measuring.
Drawings
Fig. 1 is a schematic view of a testing apparatus for detecting a leakage of a thin film according to embodiment 1 of the present invention.
The method comprises the following steps of 1-a mould with an opening, 2-a first sealing layer, 3-a breathable felt, 4-a film to be tested, 5-glue for testing, 6-a one-way breathable layer, 7-a second sealing layer, 8-a sealing adhesive tape, 9-a first vacuumizing valve and 10-a second vacuumizing valve.
Detailed Description
In order to make the technical solutions, objects and advantages of the present invention more apparent, the present invention will be described in further detail by using specific embodiments and with reference to the accompanying drawings. It should be understood that the description herein is provided for illustration and explanation of the invention and is not intended to limit the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. For the electrical and communication fields, either a wired connection or a wireless connection is possible. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Example 1
The embodiment provides a testing device for detecting glue leakage of a vacuum bag film, a schematic diagram of which is shown in fig. 1, the testing device for detecting glue leakage of the vacuum bag film comprises a mold 1 with an opening, a to-be-tested film 4 and a first sealing layer 2 which cover the opening are respectively arranged on the upper surface and the lower surface of the mold, an air felt 3 is filled between the first sealing layer 2 and the to-be-tested film 4, and the to-be-tested film is the vacuum bag film; the outward surface of the film to be tested is covered with a one-way air-permeable layer 6, the area of the one-way air-permeable layer 6 is larger than or equal to the area of the opening and smaller than the area of the first sealing layer 2, and a test glue 5 is filled between the one-way air-permeable layer 6 and the film 4 to be tested; the upper surface of the mould is also provided with a second sealing layer 7, the second sealing layer 7 covers the film 4 to be tested and the one-way ventilating layer 6, and the one-way ventilating layer 6 is ventilated towards the second sealing layer 7; the edges of the first sealing layer 2, the film 4 to be tested, the one-way gas-permeable layer 6 and the second sealing layer 7 are sealed by using sealing adhesive tapes 8; the first sealing layer comprises a first vacuum interface, the first vacuum interface is connected with a first vacuumizing valve 9, the second sealing layer comprises a second vacuum interface, and the second vacuum interface is connected with a second vacuumizing valve 10;
the diameter of the circle where the opening is located is 50cm, the diameter accounts for 90% of the area of the thin film 4 to be tested, and the depth of the opening is 10cm; the film 4 to be tested extends into the open hole to form a recess for receiving the glue 5 for testing, and the depth of the recess is 2cm; the thickness of the ventilated felt 3 is 8cm.
The first sealing layer 2 and the second sealing layer 7 are both vacuum bag films, the glue 5 for testing is thermosetting glue (epoxy resin), and the one-way breathable layer 6 is one-way breathable cloth.
Example 2
The present embodiment provides an assembly method of the testing apparatus for detecting glue leakage of vacuum bag film described in embodiment 1, where the assembly method includes:
(1) Preparing a die with an opening, wherein the diameter of a circle where the opening is located is 50cm, and the depth of the circle is 10cm; attaching a sealing adhesive tape to the periphery of the lower surface of the mold close to the opening, placing a complete vacuum bag film passing the airtightness test on the sealing adhesive tape, and covering the opening to serve as a first sealing layer;
(2) Filling an air-permeable felt into the open pore from one side of the upper surface of the mould, wherein the thickness of the air-permeable felt is 8cm;
(3) Attaching a sealing adhesive tape to the periphery of the upper surface of the mold close to the opening, placing a vacuum bag film to be tested on the sealing adhesive tape, covering the opening, and simultaneously extending a part of the vacuum bag film to be tested into the opening to form a recess, wherein the depth of the recess is 2cm;
(4) Slowly pouring thermosetting glue into the concave until the concave is filled, and preventing the glue from overflowing to the outside of the concave excessively;
(5) Taking one-way breathable cloth with the area larger than or equal to the area of the opening and smaller than the area of the first sealing layer as a one-way breathable layer, placing the one-way breathable cloth above the vacuum bag film to be tested and completely covering the recess, and using a sealing adhesive tape to enable the peripheral edge of the one-way breathable layer to be attached to the vacuum bag film to be tested so as to realize sealing;
(6) Taking another complete vacuum bag film which passes the air tightness test as a second sealing layer, wherein the area of the second sealing layer is larger than that of the film to be tested and the one-way breathable layer, so that the second sealing layer covers the film to be tested and the one-way breathable layer, and the peripheral edges of the second sealing layer are attached to and sealed on the upper surface of the mold by using a sealing adhesive tape;
(7) A first vacuum interface is arranged on the first sealing layer and is connected with a first vacuumizing valve; and arranging a second vacuum interface on the second sealing layer, connecting the second vacuum interface with a second vacuumizing valve, and sealing the peripheries of the first sealing layer and the second sealing layer which are in contact with the vacuumizing valve by using sealing adhesive tapes to obtain the testing device for detecting the adhesive leakage of the vacuum bag film.
Example 3
The embodiment provides an operation detection method using the testing apparatus for detecting glue leakage of a vacuum bag film, which is described in embodiment 1, and the operation detection method includes:
vacuumizing through the second vacuumizing valve, setting the target vacuum degree of the second vacuumizing valve to be-0.95 MPa, and maintaining the pressure (continuously vacuumizing) for 10min after the target vacuum degree is reached; discharging the gas in the space where the glue for testing is located, extruding the glue to be tested to move and diffuse, spreading the glue to be tested over and clinging to each testing area of the film to be tested, and stopping the second vacuum-pumping valve;
performing vacuum pumping operation through the first vacuum pumping valve, setting the target vacuum degree of the first vacuum pumping valve to be-0.95 MPa, and maintaining the pressure for 10min after the target vacuum degree is reached; when the first vacuumizing valve starts to vacuumize, immediately observing whether the film to be tested has a glue leakage condition, and if no obvious glue leakage condition is observed within 30min, determining that the glue leakage of the film to be tested is qualified; and if the glue leakage condition is observed within the testing time, the glue leakage of the film to be tested is unqualified, the vacuumizing is immediately stopped, the testing device for detecting the glue leakage of the vacuum bag film is disassembled, and the film to be tested is taken out for further testing.
Example 4
The embodiment provides an operation detection method of the testing device for detecting the glue leakage of the vacuum bag film, which is described in embodiment 1, and the operation detection method comprises the following steps:
simultaneously vacuumizing through a first vacuumizing valve and a second vacuumizing valve which are respectively connected to the first sealing layer and the second sealing layer, setting the target vacuum degree of the first vacuumizing valve to be-0.95 MPa and the target vacuum degree of the second vacuumizing valve to be-0.95 MPa, and keeping the pressure for 10min after the target vacuum degree is reached; when the vacuum pumping is started, immediately observing whether the film to be tested has a glue leakage condition, and if no obvious glue leakage condition is observed within 30min, determining that the glue leakage of the film to be tested is qualified; and if the glue leakage condition is observed within the testing time, the glue leakage of the film to be tested is unqualified, the vacuumizing is immediately stopped, the testing device for detecting the glue leakage of the vacuum bag film is disassembled, and the film to be tested is taken out for further testing.
The above description is only the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art are within the technical scope of the present invention, and all fall within the protection scope and the disclosure scope of the present invention.
Claims (10)
1. The testing device for detecting the adhesive leakage property of the film is characterized by comprising a die with an opening, wherein the upper surface and the lower surface of the die are respectively provided with a film to be tested and a first sealing layer which cover the opening, and an air-permeable felt is filled between the first sealing layer and the film to be tested; the outward surface of the film to be tested is covered with a one-way breathable layer, and test glue is filled between the one-way breathable layer and the film to be tested; the upper surface of the mould is also provided with a second sealing layer, and the second sealing layer covers the film to be tested and the one-way breathable layer; the edges of the first sealing layer, the film to be tested, the one-way ventilation layer and the second sealing layer are sealed; the first and second seal layers each include at least one vacuum port.
2. The testing device of claim 1, wherein the area of the opening is 80% or more of the area of the thin film to be tested.
3. The test device for detecting the adhesive leakage of the thin film according to claim 1, wherein the depth of the opening is 5-15 cm.
4. The testing device for detecting the glue leakage of the thin film according to claim 1, wherein the thin film to be tested is inserted into the opening to form a recess for receiving the glue to be tested.
5. The testing device for detecting the adhesive leakage of the thin film as claimed in claim 4, wherein the depth of the recess accounts for 3-33% of the depth of the opening.
6. The test device for detecting glue leakage of a film according to claim 1, wherein the thickness of the airfelt is 67% or more of the depth of the opening.
7. The testing device for detecting the adhesive leakage of the thin film according to claim 1, wherein the area of the one-way air-permeable layer is larger than or equal to the area of the opening hole and smaller than the area of the thin film to be tested.
8. The testing device for detecting adhesive leakage of a film according to claim 1, wherein the one-way gas-permeable layer is gas-permeable toward the second sealing layer to vent a space between the one-way gas-permeable layer and the film to be tested.
9. The test device of claim 1, wherein the first sealing layer and the second sealing layer are vacuum bag films.
10. The testing device for detecting the adhesive leakage of the film as claimed in claim 1, wherein the edges of the first sealing layer, the film to be tested, the one-way gas-permeable layer and the second sealing layer are sealed by using sealing tapes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222234292.8U CN218271912U (en) | 2022-08-24 | 2022-08-24 | A testing arrangement for detecting film leaks gluey nature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222234292.8U CN218271912U (en) | 2022-08-24 | 2022-08-24 | A testing arrangement for detecting film leaks gluey nature |
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| Publication Number | Publication Date |
|---|---|
| CN218271912U true CN218271912U (en) | 2023-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222234292.8U Active CN218271912U (en) | 2022-08-24 | 2022-08-24 | A testing arrangement for detecting film leaks gluey nature |
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| Country | Link |
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| CN (1) | CN218271912U (en) |
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2022
- 2022-08-24 CN CN202222234292.8U patent/CN218271912U/en active Active
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