CN216948357U - Tuff side slope inoxidizing coating - Google Patents
Tuff side slope inoxidizing coating Download PDFInfo
- Publication number
- CN216948357U CN216948357U CN202123130024.3U CN202123130024U CN216948357U CN 216948357 U CN216948357 U CN 216948357U CN 202123130024 U CN202123130024 U CN 202123130024U CN 216948357 U CN216948357 U CN 216948357U
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- China
- Prior art keywords
- fixedly connected
- tuff
- barred rock
- dimensional
- stone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000011248 coating agent Substances 0.000 title claims abstract description 16
- 238000000576 coating method Methods 0.000 title claims abstract description 16
- 239000011435 rock Substances 0.000 claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000004575 stone Substances 0.000 claims abstract description 41
- 241001464837 Viridiplantae Species 0.000 claims abstract description 8
- 238000003916 acid precipitation Methods 0.000 claims description 11
- 239000004744 fabric Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 3
- 239000011440 grout Substances 0.000 abstract description 3
- 239000002253 acid Substances 0.000 abstract 2
- 239000002689 soil Substances 0.000 description 22
- 238000004162 soil erosion Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000010410 layer Substances 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- 239000011241 protective layer Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000004873 anchoring Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- NRTLIYOWLVMQBO-UHFFFAOYSA-N 5-chloro-1,3-dimethyl-N-(1,1,3-trimethyl-1,3-dihydro-2-benzofuran-4-yl)pyrazole-4-carboxamide Chemical compound C=12C(C)OC(C)(C)C2=CC=CC=1NC(=O)C=1C(C)=NN(C)C=1Cl NRTLIYOWLVMQBO-UHFFFAOYSA-N 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
Landscapes
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The utility model provides a tuff side slope protection layer, which comprises a three-dimensional geonet, wherein a barred rock upright post is connected above the three-dimensional geonet, one end of the barred rock upright post is connected with a barred rock cross beam, two ends of the barred rock cross beam are connected with ecological bags, the ecological bags are connected with the three-dimensional geonet, one end of each ecological bag is connected with a grout baffle, one end of each barred rock upright post is provided with a barred rock water through groove, one side of each three-dimensional geonet is provided with a concrete column, one side of each concrete column is connected with an acid rain-proof coating, one side of each acid rain-proof coating is provided with a water through groove, one side of each water through groove is connected with the grout baffle, a slope protection green plant is arranged above the three-dimensional geonet, one sides of the ecological bags and the three-dimensional geonet are connected with anchor rods, one sides of the anchor rods are connected with large gaskets, one sides of the large gaskets are connected with the ecological bags, one ends of the anchor rods are connected with anchor rod lantern rings, one sides of the anchor rods are connected with anchor cables, has the advantage that the regular triangle formed between the stone lath upright post and the stone lath beam is firmer.
Description
Technical Field
The utility model relates to the technical field of side slope protection layers, in particular to a tuff side slope protection layer.
Background
Tuff is a volcaniclastic rock, more than 50% of volcaniclastic substances of which have particle diameters smaller than 2mm, and the components of the tuff are mainly volcanic ash, are mainly distributed in plateau areas and are soil mass which is usually encountered in building road engineering on plateaus; therefore, cutting high slopes on two sides of a road in railway road engineering are usually made of tuff, and the slope protective layer can protect the cutting slopes, so that the cutting slopes are protected, and the cutting protective layer has the effects of soil conservation, environment improvement and attractiveness.
Through retrieval, the Chinese patent with the publication number of CN207260168U discloses a tuff side slope protective layer, which comprises concrete, a three-dimensional geonet and a grout frame which are all paved on the surface of the tuff side slope; each three-dimensional geonet is distributed along the slope surface at equal intervals, a plurality of mortar-masonry frames are uniformly distributed on the upper portion and the lower portion of the surface of the tuff slope at equal intervals, the mortar-masonry frames pile the upper portion and the lower portion of the three-dimensional geonet, and concrete is laid on the surface of the tuff slope except the mortar-masonry frames.
Aiming at the problems that the displacement possibly caused by long-time rainwater showering can not stop the water and soil loss when the mortar frame is vertically placed in the technology; therefore, a tuff slope protection layer is provided.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide a tuff slope protection layer to solve or alleviate the technical problems in the prior art, and to provide at least one useful choice.
The technical scheme of the embodiment of the utility model is realized as follows: the three-dimensional geotechnical net comprises a three-dimensional geotechnical net, wherein a bar stone stand column is fixedly connected above the three-dimensional geotechnical net, and a bar stone cross beam is fixedly connected to one end of the bar stone stand column.
In some embodiments, ecological bags are fixedly connected to two ends of the barred rock cross beam, the ecological bags are fixedly connected to the three-dimensional geonet, one end of each ecological bag is fixedly connected with a stone slurry baffle, and one end of each barred rock upright post is provided with a barred rock water trough.
In some embodiments, a concrete column is fixedly installed on one side of the three-dimensional geonet, an acid rain prevention coating is fixedly connected to one side of the concrete column, a water passing groove is formed in one side of the acid rain prevention coating, and the water passing groove is fixedly connected to the stone slurry baffle.
In some embodiments, a slope protection green plant is fixedly installed above the three-dimensional geonet.
In some embodiments, the ecological bag and one side of the three-dimensional geonet are fixedly connected with an anchor rod, one side of the anchor rod is fixedly connected with a large gasket, one sides of the large gaskets at four corners are fixedly connected with the ecological bag, one side of the large gasket in the middle is fixedly connected with the slope protection green plants, and one end of the anchor rod is fixedly connected with an anchoring agent.
In some embodiments, a bolt ring is fixedly connected to one end of the bolt, and an anchor cable is fixedly connected to one side of the bolt ring.
In some embodiments, an ecological cloth is fixedly connected to one side of the stone column.
In some embodiments, a beam boss is fixedly connected to one end of the stone bar beam, and a reflective warning strip is fixedly connected to one side of the stone bar beam.
Due to the adoption of the technical scheme, the embodiment of the utility model has the following advantages:
1. the utility model provides a tuff side slope inoxidizing coating, has a stone column one end screw fixation and has a stone crossbeam, forms regular triangle between stone column and the stone crossbeam, and is more firm, prevents to lead to the fixed frame displacement to lose the advantage of protecting effect because of rainwash.
2. The utility model provides a tuff side slope inoxidizing coating, when heavy rain, the rainwater mixes earth edgewise stone stand and a stone crossbeam edge and reachs ecological bag, and earth prevents soil erosion and water loss through ecological bag filtration flow-down earth, and ecological bag prevents the ability of soil erosion and water loss and can obtain strengthening after green planting afforestation, and the rainwater is concentrated from concrete column water flowing groove and is flowed out, prevents to erode the advantage of bank protection.
3. A tuff side slope protective layer utilizes a frame formed by a barred rock stand column and a barred rock cross beam to protect plants in the frame from being corroded by rainwater at the initial growth stage, the advantages of plant protection and engineering protection can be fully exerted, meanwhile, the frame is subjected to rain-proof water and acid rain corrosion treatment, and the effectiveness is long.
The foregoing summary is provided for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will be readily apparent by reference to the drawings and following detailed description.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments or technical descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a front view of the present invention;
FIG. 2 is a top view of the present invention;
fig. 3 is a side view structural diagram of the present invention.
Reference numerals:
1-three-dimensional geonet, 2-slope protection greenery, 3-concrete column, 4-water trough, 5-acid rain prevention coating, 6-ecological bag, 7-large gasket, 8-anchor cable, 9-anchor rod, 10-stone column, 11-ecological cloth, 12-stone water trough, 13-stone beam, 14-slurry stone baffle, 15-anchor rod lantern ring, 16-beam boss, 17-reflective warning strip and 18-anchoring agent.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1:
as shown in fig. 1-3, a tuff side slope protection layer comprises a three-dimensional geonet 1, wherein the three-dimensional geonet 1 is laid on the slope protection land, a barred rock upright post 10 is fixedly connected above the three-dimensional geonet 1, a barred rock cross beam 13 is fixed at one end of the barred rock upright post 10 through a screw, and a regular triangle is formed between the barred rock upright post 10 and the barred rock cross beam 13, so that the protection layer is firmer, and the fixed frame displacement caused by rainwater erosion is prevented.
In this embodiment, the two ends of the stone bar beam 13 are fixedly connected with ecological bags 6, the ecological bags are made of double-sided ironing needle-punched non-woven fabrics made of polypropylene PP or polyester fiber PET, are commonly used for slope protection and greening, have erosion resistance, are not degraded, are only permeable to water and impermeable to soil, the ecological bag 6 is fixedly connected with the three-dimensional geotechnical net 1, one end of the ecological bag 6 is fixedly connected with a stone slurry baffle 14, one end of a stone strip upright post 10 is provided with a stone strip water trough 12, when heavy rain, rainwater mixes earth along the edge of barred rock stand 10 and reachs ecological bag 6, filters through ecological bag 6 and flows down earth, prevents soil erosion and water loss, and the ability that ecological bag 6 prevented soil erosion and water loss after green plants the afforestation can be strengthened, and rainwater in barred rock stand 10 and the barred rock crossbeam 13 frame is through barred rock limber groove 12 through the guide of barred rock crossbeam 13 and flows to ecological bag 6.
In this embodiment, three-dimensional geotechnique net 1 one side fixed mounting has concrete column 3, concrete column 3 one side is brushed and is prevented acid rain coating 5, acid rain coating 5 prevents that long-term rush of rainwater and acid rain from drenching and causing the harm to concrete column 3 and lead to the loss effect, concrete column 3 one side is opened has water trough 4, water trough 4 one side and thick liquid stone baffle 14 fixed connection, water trough 4 collects the filterable rainwater of ecological bag 6 and concentrates the flow down, prevent to cause the erodeing to the bank protection soil property, lead to the soil erosion.
In this embodiment, 1 top fixed mounting of three-dimensional geotechnological net has the green 2 of planting of bank protection, and the green 2 of planting of bank protection is planted in the region that does not have concrete column 3, barren rock stand 10 and barren rock crossbeam 13, can strengthen the soil property fastness, reduces soil erosion and water loss, plays pleasing to the eye effect that improves ecological environment simultaneously.
In this embodiment, ecological bag 6 and three-dimensional geotechnological net 1 one side fixedly connected with stock 9, stock 9 is fixed on the ground, play the reinforcement effect to ecological bag 6, three-dimensional geotechnological net 1 and the green 2 of planting of bank protection, stock 9 one side bolt fastening has large-scale gasket 7, large-scale gasket 7 plays and strengthens fixed action, be located large-scale gasket 7 one side and ecological bag 6 fixed connection in four corners, be located the green 2 fixed connection of planting of large-scale gasket 7 one side and bank protection in the middle of being located, stock 9 one end fixedly connected with anchoring agent 18.
In this embodiment, an anchor rod lantern ring 15 is welded at one end of the anchor rod 9, an anchor cable 8 is fixedly connected to one side of the anchor rod lantern ring 15, and the anchor cable 8 plays an additional reinforcing role in the anchor rod 9.
In this embodiment: the three-dimensional geotechnical net 1 is laid on slope protection soil, a regular triangle is formed between the barred rock upright post 10 and the barred rock cross beam 13, the fixing frame is more firm, the fixed frame displacement caused by rain wash is prevented, when heavy rain occurs, rainwater mixed soil reaches the ecological bag 6 along the edge of the barred rock upright post 10, the soil flows down after being filtered by the ecological bag 6, the water and soil loss is prevented, the capacity of preventing the water and soil loss of the ecological bag 6 after green planting and greening can be enhanced, the rainwater in the barred rock upright post 10 and the barred rock cross beam 13 is guided by the barred rock cross beam 13 to flow to the ecological bag 6 through the barred rock water trough 12, the acid rain preventing coating 5 prevents the damage to the concrete column 3 caused by long-term rain and the loss caused by the long-term rain washing, the water trough 4 collects the rainwater filtered by the ecological bag 6 and flows down to prevent the slope protection soil from being washed, the water and soil loss is caused, the slope protection green plant 2 without the concrete column 3, In the areas of the stone column 10 and the stone beam 13, the anchor rod 9 is fixed on the soil, and the ecological bag 6, the three-dimensional geonet 1 and the slope protection green plants 2 are reinforced.
Example 2:
a tuff slope protection layer, which is an improvement of embodiment 1, as shown in figures 1-3,
in this embodiment, the ecological cloth 11 of fixedly connected with in a side of the barred rock stand 10, ecological cloth 11 and ecological bag 6 are made for same material, prevent that barred rock stand 10 from receiving rainwater direct flush corrosion.
In this embodiment, 13 one end fixedly connected with crossbeam boss 16 of stone strip crossbeam, crossbeam boss 16 prevent that the rainwater from directly flowing out from 13 one side of stone strip crossbeam and erode the bank protection, cause soil erosion and water loss, and 13 one side screw fixation of stone strip crossbeam has reflection of light warning strip 17, and reflection of light warning strip 17 plays the warning effect to the vehicle of roadside form night.
In this embodiment: ecological cloth 11 and ecological bag 6 are made for same material, prevent that strip stone stand 10 from receiving rainwater direct washout corrosion, and crossbeam boss 16 prevents that the rainwater from directly flowing out from strip stone crossbeam 13 one side and erodees the bank protection, causes soil erosion and water loss, and reflection of light warning strip 17 plays the warning effect to the vehicle of roadside form night.
When the three-dimensional geotechnical net 1 is laid on slope protection soil, a regular triangle is formed between the barred rock upright post 10 and the barred rock cross beam 13, the fixing frame is firmer, and displacement of the fixing frame caused by rain wash is prevented, when heavy rain occurs, rain water mixed soil reaches the ecological bag 6 along the edge of the barred rock upright post 10, the soil flowing down is filtered by the ecological bag 6 to prevent water and soil loss, the capacity of the ecological bag 6 for preventing water and soil loss after green planting and greening is enhanced, rain water in the barred rock upright post 10 and the barred rock cross beam 13 is guided by the barred rock cross beam 13 to flow to the ecological bag 6 through the barred rock water trough 12, the acid rain prevention coating 5 prevents damage and loss of the concrete column 3 caused by long-term rain wash, the water trough 4 collects and flows down the rain water filtered by the ecological bag 6 to prevent washout of slope protection soil, the slope protection green plant 2 is planted on the slope protection soil without the concrete column 3, the slope protection soil is prevented from being washed by the rain water and the rain water and the water flowing down, The region of strip stone stand 10 and strip stone crossbeam 13, stock 9 is fixed on the land, to ecological bag 6, three-dimensional geotechnological net 1 and the green 2 of planting of bank protection play the reinforcement effect, ecological cloth 11 and ecological bag 6 are made for same material, prevent that strip stone stand 10 from receiving rainwater direct erosion and corrosion, crossbeam boss 16 prevents that the rainwater from directly flowing out from strip stone crossbeam 13 one side and erodees the bank protection, cause soil erosion and water loss, reflection of light warning strip 17 plays the warning effect to the vehicle of roadside form night.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various changes or substitutions within the technical scope of the present invention, and these should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (6)
1. The utility model provides a tuff side slope inoxidizing coating, includes three-dimensional geotechnological net (1), its characterized in that: three-dimensional geotechnique net (1) top fixedly connected with barred rock stand (10), barred rock stand (10) one end fixedly connected with barred rock crossbeam (13), barred rock crossbeam (13) both ends fixedly connected with ecological bag (6), ecological bag (6) fixed connection is in three-dimensional geotechnique net (1), ecological bag (6) one end fixedly connected with thick liquid stone baffle (14), barred rock stand (10) one end is opened there is barred rock water flowing groove (12), three-dimensional geotechnique net (1) one side fixed mounting has concrete column (3), concrete column (3) one side fixedly connected with acid rain resistant coating (5), acid rain resistant coating (5) one side is opened there is water flowing groove (4), water flowing groove (4) one side and thick liquid stone baffle (14) fixed connection.
2. A tuff slope protection layer according to claim 1, wherein: slope protection green plants (2) are fixedly mounted above the three-dimensional geotechnical net (1).
3. The tuff slope armor layer of claim 2, wherein: ecological bag (6) and three-dimensional geotechnological net (1) one side fixedly connected with stock (9), large-scale gasket (7) of stock (9) one side fixedly connected with, large-scale gasket (7) one side and ecological bag (6) fixed connection that are located the four corners, large-scale gasket (7) one side and ecological bag (6) bank protection green planting (2) fixed connection in the middle of being located, stock (9) one end fixedly connected with anchor (18).
4. A tuff slope protection layer according to claim 3, wherein: stock (9) one end fixedly connected with stock lantern ring (15), stock lantern ring (15) one side fixedly connected with anchor rope (8).
5. A tuff slope protection layer according to claim 1, wherein: one side of the stone column (10) is fixedly connected with an ecological cloth (11).
6. A tuff slope protection layer according to claim 1, wherein: one end of the stone bar beam (13) is fixedly connected with a beam boss (16), and one side of the stone bar beam (13) is fixedly connected with a light-reflecting warning strip (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123130024.3U CN216948357U (en) | 2021-12-14 | 2021-12-14 | Tuff side slope inoxidizing coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123130024.3U CN216948357U (en) | 2021-12-14 | 2021-12-14 | Tuff side slope inoxidizing coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216948357U true CN216948357U (en) | 2022-07-12 |
Family
ID=82307371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123130024.3U Expired - Fee Related CN216948357U (en) | 2021-12-14 | 2021-12-14 | Tuff side slope inoxidizing coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216948357U (en) |
-
2021
- 2021-12-14 CN CN202123130024.3U patent/CN216948357U/en not_active Expired - Fee Related
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Granted publication date: 20220712 |