CN219915327U - Device for evaluating bonding degree of ice suppression asphalt mixture and ice layer - Google Patents
Device for evaluating bonding degree of ice suppression asphalt mixture and ice layer Download PDFInfo
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- CN219915327U CN219915327U CN202320909905.5U CN202320909905U CN219915327U CN 219915327 U CN219915327 U CN 219915327U CN 202320909905 U CN202320909905 U CN 202320909905U CN 219915327 U CN219915327 U CN 219915327U
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- ice
- asphalt mixture
- test piece
- suppression
- ice layer
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- 239000010426 asphalt Substances 0.000 title claims abstract description 72
- 239000000203 mixture Substances 0.000 title claims abstract description 70
- 230000001629 suppression Effects 0.000 title claims abstract description 47
- 238000012360 testing method Methods 0.000 claims abstract description 87
- 239000004927 clay Substances 0.000 claims description 13
- 230000005764 inhibitory process Effects 0.000 claims description 7
- 229920000728 polyester Polymers 0.000 claims description 6
- 230000007547 defect Effects 0.000 abstract description 9
- 238000005259 measurement Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 120
- 230000002401 inhibitory effect Effects 0.000 description 7
- 239000002390 adhesive tape Substances 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 230000008014 freezing Effects 0.000 description 4
- 238000007710 freezing Methods 0.000 description 4
- 101000828805 Cowpox virus (strain Brighton Red) Serine proteinase inhibitor 2 Proteins 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
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- 230000005494 condensation Effects 0.000 description 2
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- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 238000011068 loading method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000003075 superhydrophobic effect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000011384 asphalt concrete Substances 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000011549 displacement method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000013100 final test Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 150000003839 salts Chemical class 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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- 239000004575 stone Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to a device for evaluating the bonding degree of an ice suppression asphalt mixture and an ice layer, which comprises a pull rod, a spherical hinge, a pulling head and an ice suppression asphalt mixture test piece which are sequentially arranged from top to bottom, wherein two ends of the spherical hinge are respectively connected with the pull rod and the pulling head, and various transverse micro stresses of the pulling head can be eliminated after the spherical hinge is stressed, so that the pulling direction of the pulling head is along the vertical direction. The pulling head and the ice suppression asphalt mixture test piece are respectively used for bonding the upper end of the ice layer and the lower end of the ice layer, the end surface areas of the pulling head lower end, the ice layer and the ice suppression asphalt mixture test piece are the same, the defect that the bonding area is continuously changed or the pulling head area is too small is avoided, the bonding area and the bonding strength of the ice layer and the test piece can be kept, the accuracy of the test is improved, and the test is more in line with the reality. The utility model has simple measurement and lower cost, and the reflected bonding strength is more objective.
Description
Technical Field
The utility model relates to the technical field of road engineering, in particular to a device for evaluating the bonding degree of an ice suppression asphalt mixture and an ice layer.
Background
More than 70% of roads in China can be affected by ice and snow weather in winter, the friction coefficient between the road surface and tires is greatly reduced due to ice and snow on the road surface, serious potential safety hazards exist, and casualties and mass loss of national economy are caused by ice and snow disasters on the road surface each year. At present, a great deal of research experiments are carried out on ice inhibition materials by students at home and abroad, wherein the salt-accumulating ice inhibition asphalt mixture has the advantages of good ice inhibition effect, slow release long-acting property, small influence on environment and the like, and is attracting more and more attention. The research shows that the bonding strength of the contact interface between the salt-accumulating ice-inhibiting asphalt mixture and the ice layer is obviously reduced when the ice-accumulating salt-inhibiting asphalt mixture is below the freezing point, so that the ice layer is easier to remove under the action of mechanical deicing or vehicle rolling, and the bonding performance of the contact interface between the ice layer and a test piece is more and more concerned.
The prior art discloses an ice inhibition performance detection device, which comprises a pulling and pressing device, a coated super-hydrophobic coating, a test piece and a universal testing machine, wherein the inner side of the pulling and pressing device is provided with a groove for placing an ice layer and the test piece; the brush super-hydrophobic coating is arranged between the ice layer and the test piece, the ice layer is frozen above the test piece, the two drawing heads are respectively arranged above and below the ice layer and the test piece, and the universal testing machine is arranged at the top end of the drawing head above and used for providing downward pressure for the test piece.
The technical problems are as follows:
the pulling force of the pulling head cannot be kept along the vertical direction, the stress direction of the ice layer and the test piece is unstable, the bonding area and the bonding strength of the ice layer and the test piece are continuously changed, and the accuracy of the test result is low.
Disclosure of Invention
Aiming at the problems existing in the prior art, the utility model aims at: the device for evaluating the bonding degree of the ice suppression asphalt mixture and the ice layer can ensure that the tensile force of the pulling head is along the vertical direction, the bonding area and the bonding strength of the ice layer and a test piece are maintained, and the accuracy of a test result is high.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a device for evaluating but ice asphalt mixture and ice layer degree of bonding, includes pull rod, spherical hinge, pull head and the ice asphalt mixture test piece that restraines that sets gradually from top to bottom, and spherical hinge both ends are connected in pull rod and pull head respectively, and pull head and the ice asphalt mixture test piece that restraines are used for bonding ice layer upper end and ice layer lower extreme respectively, and the terminal surface area of pull head lower extreme, ice layer and the ice asphalt mixture test piece three that restraines is the same.
Further, the lower end of the drawing head is fixedly connected with a polyester felt.
Further, the spherical hinge is in threaded connection with the drawing head, so that the installation and the disassembly are convenient.
Further, the central lines of the pull rod, the pull head and the spherical hinge are overlapped. The pulling head always keeps vertical stress along the central line direction, which is beneficial to obtaining more accurate measurement results.
Further, the diameter of the upper end of the drawing head is larger than that of the lower end.
Further, the diameter of the upper end of the drawing head is 121.6mm-141.6mm, and the diameter of the lower end is 101.6mm.
Further, the section of the ice suppression asphalt mixture test piece is circular, and the diameter of the ice suppression asphalt mixture test piece is the same as that of a standard Marshall test piece, and is preferably 101.6mm.
Further, the outside of the ice suppression asphalt mixture test piece is wrapped with ultra-light clay.
Further, the thickness of the ultra-light clay is 2mm-5mm.
Further, the ultra-light clay had a thickness of 3mm.
In general, the utility model has the following advantages:
the pull rod is connected with the pull head through the spherical hinge, and after the spherical hinge receives the upward tension of the pull rod, various transverse micro stresses of the pull head can be eliminated, so that the direction of the tension applied to the pull head is along the vertical direction. The bonding areas of the lower end of the pulling head, the ice layer and the ice-inhibiting asphalt mixture test piece are kept the same, the defect that the bonding area is continuously changed or the area of the pulling head is too small is avoided, the bonding area and the bonding strength of the ice layer and the test piece can be kept, the accuracy of the test is improved, and the test is more in accordance with the actual condition.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model.
Fig. 2 is a schematic top view of the drawing head of the present utility model.
Fig. 3 is a cross-sectional view of the drawing head of the present utility model.
Fig. 4 is a schematic view of the bottom structure of the drawing head of the present utility model.
Fig. 5 is a schematic diagram of the structure of a test piece of the ice suppression asphalt mixture of the utility model.
The drawings include:
1-pull rod, 2-spherical hinge, 3-ice layer, 4-pull head, 5-ice suppression asphalt mixture test piece, 6-screw hole, 7-polyester felt, 8-foam double faced adhesive tape and 9-ultra-light clay.
Detailed Description
The present utility model will be described in further detail below.
As shown in fig. 1 and 4, the device for evaluating the bonding degree of the ice suppression asphalt mixture and the ice layer comprises a spherical hinge 2, a drawing head 4, a pull rod 1 and an ice suppression asphalt mixture test piece 5, wherein the bottom end of the pull rod 1 is connected with the spherical hinge 2, and the other end of the spherical hinge 2 is connected with the drawing head 4; the ice suppression asphalt mixture test piece 5 is adhered below the ice layer 3, and the diameters of the drawing head 4, the ice layer 3 and the ice suppression asphalt mixture test piece 5 are the same, so that the adhesion areas of the drawing head 4, the ice layer 3 and the ice suppression asphalt mixture test piece 5 are kept consistent, the defect that the adhesion area is continuously changed or the area of the drawing head 4 is too small is avoided, the accuracy of the test is improved, and the test is more in line with the reality.
The bottom surface of the lower layer of the drawing head 4 is glued with a layer of polyester felt 7 with the diameter of c through AB, and the drawing head 4 and the ice layer 3 are tightly bonded together by utilizing the polyester felt 7 with high strength and excellent permeability, so that the defect that the drawing head 4 and the ice layer 3 are easy to fall off to cause test failure is avoided;
the pulling force F acting on the pull rod 1 can be provided by a universal pulling force tester, an MTS tester, an anchor rod drawing instrument and other instruments, and adopts loading modes such as stress control or strain control and the like;
during testing, the ice suppression asphalt mixture test piece 5 is fixed on a horizontal plane.
As shown in fig. 2 and 3, a threaded hole 6 is formed in the geometric center of the drawing head 4, threads are formed outside the spherical hinge 2, and the spherical hinge 2 is in threaded connection with the threaded hole 6.
The diameter of the threaded hole 6 is b, which is matched with the diameter of the spherical hinge 2; the spherical hinge 2 and the drawing head 4 are connected into a whole in a threaded manner, the center lines of the spherical hinge 2 and the drawing head 4 are coincident, when the spherical hinge 2 and the spherical hinge are stressed, various transverse micro stresses of the drawing head 4 can be eliminated by the spherical hinge 2, and in order to keep the stressed vertical upward drawing, the threaded hole 6 is positioned at the geometric center of the drawing head 4, so that the stressed direction of the drawing head 4 is the vertical direction along the center line.
Preferably, the pull rod 1 and the drawing head 4 are coincident with the center line of the spherical hinge 2.
The pull rod 1 is connected to the spherical hinge 2, the spherical hinge 2 eliminates various transverse micro stresses of the pull rod 1 and the drawing head 4, and along with upward pulling of the pull rod 1, the drawing head 4 always keeps vertical stress along the central line direction, so that more accurate measurement results are obtained.
Preferably, the diameter of the ice suppression asphalt mixture test piece 5 is 101.6mm as that of a standard Marshall test piece.
As shown in fig. 3, the diameter c=101.6 mm of the lower layer of the drawing head 4 is kept consistent with the diameter of a standard marshall test piece. The diameter a of the upper layer is larger than the diameter c of the lower layer, the unilateral difference f of the upper layer and the lower layer is 10mm-20mm, namely a is 121.6mm-141.6mm, the thickness d of the upper layer is 10mm-15mm, and the thickness e of the lower layer is 5mm-10mm;
in this example, f=20mm, a=141.6mm, d=15mm, e=10mm.
The ice suppression asphalt mixture test piece 5 is externally wrapped with ultra-light clay 9, and the thickness of the ultra-light clay 9 is 2mm-5mm.
As shown in fig. 5, before water freezes into the ice layer 3, water can enter the gap of the ice suppression asphalt mixture test piece 5 and flow out, the ultra-light clay 9 is tightly wrapped outside the ice suppression asphalt mixture test piece 5, and as the compactness is good, the ultra-light clay 9 can play a good role in preventing water seepage, so that water freezes into ice in the gap of the ice suppression asphalt mixture test piece 5, the tested environment is closer to the real road environment, the ultra-light clay 9 is lighter in weight, the weight of the ice suppression asphalt mixture test piece 5 is not excessively increased, the accuracy of test results is not influenced, and the accuracy of the test results is higher and accords with the actual conditions.
The pull rod 1, the spherical hinge 2 and the drawing head 4 are all made of stainless steel. The pull rod 1, the spherical hinge 2 and the pull head 4 are high in strength, not easy to deform, high in stability in frozen environment and not capable of affecting final testing accuracy.
Specifically, the drawing head 4, the ice suppression asphalt mixture test piece 5 and the ice layer 3 are frozen and bonded in a freezing environment, so that the freezing condition and the temperature of the three are kept consistent, the testing environment is more similar to the real road environment, and the accuracy of the testing result is improved.
The device tests the bonding strength of the ice suppression asphalt mixture, and the test results are as follows:
and S1, performing water seepage prevention treatment, and wrapping the bottom surface and the side surface of the ice inhibition asphalt mixture test piece 5 by using ultra-light clay 9, wherein the wrapping thickness is 3mm.
Step S2, calculating the height g of the water storage space, firstly determining the thickness of the test ice layer 3, where the thickness is denoted by h, then the height g=e+h of the water storage space, surrounding the ice suppression asphalt mixture test piece 5 subjected to water seepage prevention treatment by adopting the foam double faced adhesive tape 8, and forming a water storage space with the height g at the upper surface of the ice suppression asphalt mixture test piece 5.
And S3, slowly filling the water storage space with deionized water, standing for 10-15 min, and slowly pouring the deionized water into the water storage space again until water overflows.
And S4, aligning the drawing head 4 with the water storage space, horizontally and slowly placing the drawing head into the water storage space, enabling the upper layer of the drawing head 4 to be clamped with the foam double-sided adhesive tape 8, and enabling the whole lower layer of the drawing head 4 to be embedded into the water storage space.
And S5, placing the ice suppression asphalt mixture test piece 5 processed through the steps into a constant temperature refrigerator to be frozen for 6-8 hours.
And S6, taking the frozen ice-inhibiting asphalt mixture test piece 5 out of the constant temperature refrigerator, rapidly fixing the ice-inhibiting asphalt mixture test piece on a horizontal plane, and removing the foam double faced adhesive tape 8.
And S7, fixing the spherical hinge 2 on the pulling head 4 through the threaded hole 6, connecting the pull rod 1 with the spherical hinge 2, applying a vertical upward pulling force F to the pull rod 1 by adopting loading equipment until the ice layer 3 is separated from the upper surface of the ice suppression asphalt mixture test piece 5, and recording information such as the pulling force F, displacement and the like.
Step S8, dividing the tension peak value (N) by the upper surface area (m 2 ) The bond strength (MPa) was obtained.
And S9, photographing the joint surface of the ice layer 3 and the ice suppression asphalt mixture test piece 5 by adopting a digital camera, marking the area of the ice layer 3 remained on the ice suppression asphalt mixture test piece 5 by utilizing image processing software, obtaining the surface area of the ice layer, and dividing the surface area of the ice layer 3 remained on the ice suppression asphalt mixture test piece 5 by the upper surface area of the ice suppression asphalt mixture test piece 5 to obtain the residual ice rate.
The test selects SBS (I-D) modified asphalt, aggregate adopts limestone macadam, filler self-controls ice inhibitor, and the adopted asphalt, aggregate and ice inhibitor all meet the requirements of the technical Specification for construction of Highway asphalt pavement (JTGF 40-2004), and the ice inhibitor is prepared by stirring calcium chloride powder and porous carrier zeolite powder by a dry method. Adopts fine-grain dense asphalt concrete mixture AC-13 mineral aggregate grading median value, and the designed void ratio is 4%. The optimal oil-stone ratio of the ice suppression asphalt mixture is determined by a Marshall test method, wherein the mixing amount of the ice suppression agent is calculated according to a volume displacement method, and the substitution rate of the ice suppression agent in the salt-storage ice suppression asphalt mixture to the filler is 100%. The upper surface of the salt-accumulating ice-inhibiting asphalt mixture test piece 5 at different temperatures is evaluated for bonding degree with the ice layer 3 by taking the test temperature as a variable, and the bonding strength and the residual ice rate are used as evaluation indexes, wherein the test results are shown in the following table:
| temperature (. Degree. C.) | -5 | -7 | -9 | -11 |
| Bond Strength (MPa) | 0.0623 | 0.0884 | 0.1367 | 0.1665 |
| Residual ice ratio (%) | 0 | 12.9 | 28.6 | 42.5 |
Compared with the prior art, the utility model has the beneficial effects that:
1. the diameters of the lower layer of the pulling head 4, the ice layer 3 and the ice suppression asphalt mixture test piece 5 are consistent, and the contact area of the pulling head 4 and the ice layer 3 is constant, so that the device can evaluate the bonding degree of the whole upper surface of the ice suppression asphalt mixture test piece 5 and the ice layer 3, and the defect that the bonding area of the ice layer 3 and the ice suppression asphalt mixture test piece 5 in the prior art is continuously changed or the area of the pulling head 4 is too small is overcome.
2. The spherical hinge 2 can effectively eliminate various transverse micro stresses of the pulling head 4, so that the pulling head 4 is kept in an axial stress and vertical pulling state, and the defect that the test device and the test method in the prior art are difficult to ensure vertical pulling is avoided.
3. The polyester felt 7 ensures that the ice layer 3 and the drawing head 4 are firmly bonded, and avoids the defect that the drawing head 4 and the ice layer 3 in the prior art are easy to fall off to cause test failure.
4. The water is frozen in the water storage space on the upper surface of the ice-inhibiting asphalt mixture, and the freezing mode of the ice layer 3 of the actual road is more similar, so that the defect that the condensation mode of the ice layer 3 in the prior art is different from the condensation condition of the ice layer 3 of the actual road is avoided.
5. The device has simple structure, the used equipment is simple and convenient, the test cost is reduced, the device is suitable for being used in construction sites and laboratories, and the defect that the system test condition in the prior art is severe is avoided.
The above examples are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present utility model should be made in the equivalent manner, and the embodiments are included in the protection scope of the present utility model.
Claims (10)
1. A device for evaluating the degree of bonding of ice suppression asphalt mixture and ice layer, its characterized in that: the device comprises a pull rod, a spherical hinge, a pull head and an ice suppression asphalt mixture test piece which are sequentially arranged from top to bottom, wherein two ends of the spherical hinge are respectively connected with the pull rod and the pull head, the pull head and the ice suppression asphalt mixture test piece are respectively used for bonding the upper end of an ice layer and the lower end of the ice layer, and the end surface areas of the lower end of the pull head, the ice layer and the ice suppression asphalt mixture test piece are the same.
2. The apparatus for evaluating the adhesion degree of an ice suppressing asphalt mixture to an ice layer according to claim 1, wherein: the lower end of the pulling head is fixedly connected with a polyester felt.
3. The apparatus for evaluating the adhesion degree of an ice suppressing asphalt mixture to an ice layer according to claim 1, wherein: the spherical hinge is connected with the drawing head through screw threads.
4. The apparatus for evaluating the adhesion degree of an ice suppressing asphalt mixture to an ice layer according to claim 1, wherein: the central lines of the pull rod, the drawing head and the spherical hinge are overlapped.
5. The apparatus for evaluating the adhesion degree of an ice suppressing asphalt mixture to an ice layer according to claim 1, wherein: the diameter of the upper end of the drawing head is larger than that of the lower end.
6. The apparatus for evaluating the adhesion of ice suppressing asphalt mixture to an ice layer according to claim 5, wherein: the diameter of the upper end of the drawing head is 121.6mm-141.6mm, and the diameter of the lower end is 101.6mm.
7. The apparatus for evaluating the adhesion degree of an ice suppressing asphalt mixture to an ice layer according to claim 1, wherein: the section of the ice inhibition asphalt mixture test piece is circular, and the diameter of the ice inhibition asphalt mixture test piece is the same as that of a standard Marshall test piece.
8. The apparatus for evaluating the adhesion degree of an ice suppressing asphalt mixture to an ice layer according to claim 1, wherein: the outside of the ice suppression asphalt mixture test piece is wrapped with ultra-light clay.
9. The apparatus for evaluating the adhesion of ice suppressing asphalt mixture to ice layer according to claim 8, wherein: the thickness of the ultra-light clay is 2mm-5mm.
10. The apparatus for evaluating the adhesion of ice suppressing asphalt mixture to ice layer according to claim 9, wherein: the thickness of the ultra-light clay is 3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320909905.5U CN219915327U (en) | 2023-04-21 | 2023-04-21 | Device for evaluating bonding degree of ice suppression asphalt mixture and ice layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320909905.5U CN219915327U (en) | 2023-04-21 | 2023-04-21 | Device for evaluating bonding degree of ice suppression asphalt mixture and ice layer |
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| Publication Number | Publication Date |
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| CN219915327U true CN219915327U (en) | 2023-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320909905.5U Active CN219915327U (en) | 2023-04-21 | 2023-04-21 | Device for evaluating bonding degree of ice suppression asphalt mixture and ice layer |
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| Country | Link |
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| CN (1) | CN219915327U (en) |
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- 2023-04-21 CN CN202320909905.5U patent/CN219915327U/en active Active
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