CN215252090U - Energy-conserving drainage road surface of sponge city planning usefulness - Google Patents
Energy-conserving drainage road surface of sponge city planning usefulness Download PDFInfo
- Publication number
- CN215252090U CN215252090U CN202121455475.1U CN202121455475U CN215252090U CN 215252090 U CN215252090 U CN 215252090U CN 202121455475 U CN202121455475 U CN 202121455475U CN 215252090 U CN215252090 U CN 215252090U
- Authority
- CN
- China
- Prior art keywords
- water
- drainage
- layer
- water storage
- energy
- 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.)
- Active
Links
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
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Landscapes
- Sewage (AREA)
Abstract
The utility model provides an energy-saving drainage pavement for sponge city planning, which comprises a permeable layer; the permeable layer consists of a cement stabilizing layer and a water-absorbing macadam surface layer, and the water-absorbing macadam surface layer is positioned at the top of the cement stabilizing layer; the auxiliary installation body is of a rectangular block structure, and the top of the auxiliary installation body is provided with a cutting groove which is inclined by forty-five degrees and is shaped like a Chinese character 'jing'. Inside locating piece and limit installation piece can be embedded into the constant head tank of splice bottom, and then be convenient for lay of splice, simultaneously because of the length width of the installation body is less than the length width of splice, can form a drainage cavity of keeping in between the installation body of laying and the subassembly of leading to water and the permeable bed, when rainfall is great, the guiding gutter of the sloping trough of splice and spacing body, can arrange the rainwater into the drainage cavity inboard of installation body and splice fast, the drainage of permeating water is carried out by the permeable bed again, when rainfall is great, and then can improve drainage effect.
Description
Technical Field
The utility model belongs to the technical field of the drainage road surface, more specifically says, in particular to energy-conserving drainage road surface that sponge city planning was used.
Background
The sponge city is a new generation of city rainfall flood management concept, means that the city can have good elasticity in the aspects of adapting to environmental changes, coping with natural disasters caused by rainwater and the like a sponge, and can also be called as a water elasticity city, and road surface drainage is the central importance of the sponge city.
Based on the above, the present inventors found that the following problems exist in use:
one is, present arbitrary road drainage road surface can carry out the drainage in rainy day, but pavement drainage road surface's drainage flow is limited, and when the rainfall was great, the rainwater can not flow into the bottom of way brick fast and keep in, and in addition, drainage road surface is relatively poor to the processing of rainwater, can not carry out effectual collection and filtration, when to the use in later stage, damages spray equipment easily.
Therefore, in view of the above, research and improvement are made for the existing structure and defects, and an energy-saving drainage road surface for sponge city planning is provided, so as to achieve the purpose of higher practical value.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an energy-conserving drainage road surface that sponge city planning was used to solve current one, present arbitrary road drainage road surface can carry out the drainage in rainy day, but the drainage flow on pavement drainage road surface is limited, when the rainfall is great, the rainwater can not flow into the bottom of way brick fast and keep in, moreover, drainage road surface is relatively poor to the processing of rainwater, can not carry out effectual collection and filtration, when the use to the later stage, damage the problem of spraying equipment easily.
The utility model relates to an energy-conserving drainage road surface's that sponge city planning was used purpose and efficiency is reached by following specific technological means:
an energy-saving drainage pavement for sponge city planning comprises a permeable layer; the permeable layer consists of a cement stabilizing layer and a water-absorbing macadam surface layer, and the water-absorbing macadam surface layer is positioned at the top of the cement stabilizing layer;
the auxiliary installation body is of a rectangular block structure, and the top of the auxiliary installation body is provided with a cutting groove which is inclined by forty-five degrees and is shaped like a Chinese character 'jing'.
Further, the sedimentation filter tank comprises:
the water storage tank adopts a rectangular shell structure, two water storage tanks are symmetrically arranged on the front and back of each sedimentation filter tank, a water outlet is formed in one side of the top of the water storage tank, an L-shaped water drainage pipe is arranged on one side of the bottom of the water storage tank and penetrates through a road surface, and one side of the top of the water storage tank is connected with a communication hole in the top of the sedimentation filter tank.
Further, the subassembly that leads to water includes:
drainage, drainage adopt with leading to the same semicircular platelike structure of water subassembly, and one side of drainage is provided with the location spread groove, inside circular protruding imbedding the location spread groove, the other end of drainage is provided with circular location arch, this circular location arch can be imbedded in the locating hole of leading to the water subassembly inboard, and both ends symmetry is provided with the drainage connector around the drainage, drainage accessible pipeline communicates each other.
Further, the sedimentation filter tank adopts a rectangular shell mechanism, a baffle is arranged at the middle position in the sedimentation filter tank, communication holes are formed in the baffle at equal distances, the pipeline of the drainage piece is communicated with the middle position of the lower part of the sedimentation filter tank, and the communication holes are symmetrically formed in the left and right of the top of the sedimentation filter tank.
Further, the auxiliary installation body comprises:
the auxiliary installation bodies and the splicing blocks are of square structures, the length and width of the auxiliary installation bodies are smaller than those of the splicing blocks, and in an installation state, intervals are formed between the auxiliary installation bodies;
the side mounting block is half of the auxiliary mounting body after cutting, and the length of the side mounting block is the same as the length and the width of the splicing block.
Further, the subassembly that leads to water includes:
the water passing assembly is of a plate-shaped structure with a semicircular vertical section, the top of the water passing assembly is provided with water seepage holes in a fan-shaped arrangement at equal intervals, one side of the water passing assembly is provided with three circular positioning holes, the other side of the water passing assembly is provided with three circular bulges, and the circular bulges can be embedded into the inner sides of the positioning holes of the other water passing assembly;
the drainage piece is communicated with the sedimentation filter tank through a pipeline.
Further, the permeable layer includes:
the water storage layer is of a rectangular structure and is bisected, a semicircular cavity is formed in the bottom of the water storage layer, the water storage layer is located at the bottom of the water permeable layer, and the bottom of the water storage layer is a foundation consisting of a sandstone layer and plain soil;
the limiting plate is of a rectangular plate-shaped structure and is positioned between the water storage layer and the foundation;
the top of the permeable layer is provided with an auxiliary mounting body;
the inside of aquifer is fixed with leads to water subassembly.
Further, the auxiliary installation body comprises:
the positioning blocks are of a square plate-shaped structure with isosceles trapezoid cross sections and are arranged at the tops of the auxiliary mounting bodies in an annular mode;
the limiting body is of a rectangular block structure, four water guide grooves are annularly arranged on the limiting body, and the limiting body is fixedly arranged in the middle of the top of the auxiliary mounting body;
the splice block, the splice block adopts the rectangular plate structure that the bilateral symmetry in both ends was amputated around, and the top outside of splice block is the inclined groove that the annular arrangement was provided with L shape, and this inclined groove bottom and the cut groove intercommunication of cutting on the supplementary installation body, and the bottom of splice block is the annular arrangement and is provided with the constant head tank, and the locating piece can be embedded into the inboard of constant head tank.
Compared with the prior art, the utility model discloses following beneficial effect has:
the arrangement of the positioning block and the splicing block is favorable for improving the practicability of a drainage road surface, the positioning block and the edge mounting block can be embedded into the positioning groove at the bottom of the splicing block, so that the laying of the splicing block is facilitated, meanwhile, because the length and the width of the mounting body are smaller than those of the splicing block, a temporary drainage cavity can be formed between the laid mounting body and the water passing component and the water permeable layer, when the rainfall is large, the inclined groove of the splicing block and the water guide groove of the limiting body can quickly discharge rainwater into the mounting body and the inner side of the drainage cavity of the splicing block, and then the water passing layer can conduct water passing and drainage, so that when the rainfall is large, the drainage effect can be improved;
the middle position in the sedimentation filter tank is provided with a baffle, and then the sedimentation filter tank is divided into the sedimentation filter tank and the filter tank, rainwater enters into the inside of water storage box from the sedimentation filter tank bottom and temporarily stores, simultaneously can be connected the wash port at the top of the water storage box with outside sewer, after the water storage water in the water storage box is full, the wash port of the water storage box can be followed and flowed out, outside spraying equipment can be connected through L shape drain pipe simultaneously, flower can be watered through filterable rainwater, the equipment that sprays can still be avoided influencing by filterable rainwater.
Drawings
Fig. 1 is a schematic axial view of the present invention.
Fig. 2 is a schematic side-sectional structure of the present invention.
Fig. 3 is the schematic view of the structure of the sedimentation filter tank and the water storage tank viewed from the bottom.
Fig. 4 is an axial view structural diagram of the installation body and the splicing block of the present invention.
In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:
1. a water permeable layer; 101. a aquifer; 102. a limiting plate; 2. an installation body; 201. positioning blocks; 202. a limiting body; 203. splicing blocks; 204. an edge mounting block; 3. a water-through component; 301. a circular protrusion; 302. a drainage member; 303. a pipeline; 4. a sedimentation filter tank; 401. a water storage tank; 402. an L-shaped drain pipe.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like 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 "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
as shown in figures 1 to 4:
the utility model provides an energy-saving drainage pavement for sponge city planning, which comprises a permeable layer 1; the permeable layer 1 consists of a cement stabilizing layer and a water-absorbing macadam surface layer, and the water-absorbing macadam surface layer is positioned at the top of the cement stabilizing layer; the auxiliary installation body 2 is of a rectangular block structure, and the top of the auxiliary installation body 2 is provided with a cutting groove which is inclined by forty-five degrees and is similar to a Chinese character 'jing'.
Wherein, permeable layer 1 is including: the water storage layer 101 is of a rectangular structure and is bisected, a semicircular cavity is formed in the bottom of the water storage layer 101, the water storage layer 101 is located at the bottom of the water permeable layer 1, and a foundation consisting of a sandstone layer and plain soil is arranged at the bottom of the water storage layer 101; the limiting plate 102 is of a rectangular plate-shaped structure, and the limiting plate 102 is located between the aquifer 101 and the foundation; the top of the permeable layer 1 is provided with an auxiliary mounting body 2; the water storage layer 101 is internally and fixedly provided with a water passing component 3.
Wherein, supplementary installation body 2 is including: the positioning block 201 is of a square plate-shaped structure with an isosceles trapezoid cross section, and the positioning blocks 201 are annularly arranged at the top of the auxiliary installation body 2; the limiting body 202, the limiting body 202 adopts the rectangular block structure, and the limiting body 202 is arranged in a ring shape and provided with four water chutes, the limiting body 202 is fixedly arranged at the middle position of the top of the auxiliary installation body 2; splice block 203, splice block 203 adopts the rectangular plate structure that the bilateral symmetry in both ends was amputated around, and the top outside of splice block 203 is the inclined groove that the annular arrangement was provided with L shape, and this inclined groove bottom communicates with the cutting groove on the supplementary installation body 2, and the bottom of splice block 203 is the annular arrangement and is provided with the constant head tank, and locating piece 201 can be embedded into the inboard installation body 2 of constant head tank including: the auxiliary installation body 2 and the splicing blocks 203 are both in a square structure, the length and width of the auxiliary installation body 2 are smaller than those of the splicing blocks 203, and in an installation state, the auxiliary installation body 2 is spaced; the side mounting block 204, the side mounting block 204 is a half of the auxiliary mounting body 2 after cutting, and the length of the side mounting block 204 is the same as the length and width of the splicing block 203;
wherein, water passing component 3 includes: the water passing component 3 adopts a plate-shaped structure with a semicircular vertical section, the top of the water passing component 3 is provided with water seepage holes in a fan-shaped arrangement at equal intervals, one side of the water passing component 3 is provided with three circular positioning holes, the other side of the water passing component 3 is provided with three circular bulges 301, and the circular bulges 301 can be embedded into the inner sides of the positioning holes of the other water passing component 3; the drainage member 302 is communicated with the sedimentation filter tank 4 through a pipeline 303; the water passing component 3 comprises: drainage 302, drainage 302 adopt the semicircular platelike structure the same with the subassembly 3 that leads to water, and one side of drainage 302 is provided with the location spread groove, inside circular protruding 301 can be embedded into the location spread groove, the other end of drainage 302 is provided with circular location arch, this circular location arch can be embedded into the locating hole inboard that leads to water subassembly 3, and both ends symmetry is provided with the drainage connector around drainage 302, drainage 302 accessible pipeline 303 communicates each other.
The sedimentation filtering tank 4 adopts a rectangular shell mechanism, a baffle is arranged at the middle position in the sedimentation filtering tank 4, communication holes are equidistantly formed in the baffle, the pipeline 303 of the drainage piece 302 is communicated with the middle position of the lower part of the sedimentation filtering tank 4, and the communication holes are symmetrically formed in the left and right of the top of the sedimentation filtering tank 4; the sedimentation filter tank 4 comprises: the water storage tank 401 adopts a rectangular shell structure, two water storage tanks 401 are symmetrically arranged in the front and back of each sedimentation filter tank 4, a water outlet is formed in one side of the top of each water storage tank 401, an L-shaped drain pipe 402 is arranged in one side of the bottom of each water storage tank 401 and penetrates through the road surface, and one side of the top of each water storage tank 401 is connected with a communication hole in the top of each sedimentation filter tank 4.
The specific use mode and function of the embodiment are as follows:
in the utility model, when in use, when the splicing blocks 203 are laid, four mounting bodies 2 are annularly arranged at the outer sides of every four splicing blocks 203, and four splicing blocks 203 are arranged at the outer sides of every two limiting bodies 202, and the positioning block 201 and the edge mounting block 204 can be embedded into the positioning groove at the bottom of the splicing block 203, so as to facilitate the laying of the splicing blocks 203, meanwhile, because the length and the width of the mounting bodies 2 are less than the length and the width of the splicing blocks 203, a temporary drainage cavity can be formed between the laid mounting bodies 2, the water-permeable component 3 and the permeable layer 1, when the rainfall is large, the inclined grooves of the splicing blocks 203 and the water guide grooves of the limiting bodies 202 can quickly drain rainwater into the inner sides of the drainage cavities of the mounting bodies 2 and the splicing blocks 203, and then the permeable drainage is carried out by the permeable layer 1, when rainwater passes through the water storage layer 101, part of the rainwater enters the water-permeable component 3 through the seepage holes, then in the inside of entering into drainage 302, the inside of subsiding filtering ponds 4 is discharged into by pipeline 303 again, subside the inside intermediate position of filtering ponds 4 and be provided with the baffle, and then will subside filtering ponds 4 and split into sedimentation tank and filtering ponds, the rainwater enters into the inside of water storage tank 401 from subsiding filtering ponds 4 bottom and keeps in, can be connected the wash port and the outside sewer at water storage tank 401 top simultaneously, after water storage tank 401 is full of inside storage water, can follow the wash port outflow of water storage tank 401, outside spraying apparatus can connect through L shape drain pipe 402 simultaneously, can water flowers through filterable rainwater, the filterable rainwater can also avoid influencing spraying apparatus.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (8)
1. The utility model provides an energy-conserving drainage road surface of sponge city planning usefulness which characterized in that: the method comprises the following steps:
a water permeable layer; the permeable layer consists of a cement stabilizing layer and a water-absorbing macadam surface layer, and the water-absorbing macadam surface layer is positioned at the top of the cement stabilizing layer;
the auxiliary installation body is of a rectangular block structure, and the top of the auxiliary installation body is provided with a cutting groove which is inclined by forty-five degrees and is shaped like a Chinese character 'jing'.
2. An energy-saving drainage pavement for planning sponge cities as claimed in claim 1, wherein: the permeable layer comprises:
the water storage layer is of a rectangular structure and is bisected, a semicircular cavity is formed in the bottom of the water storage layer, the water storage layer is located at the bottom of the water permeable layer, and the bottom of the water storage layer is a foundation consisting of a sandstone layer and plain soil;
the limiting plate is of a rectangular plate-shaped structure and is positioned between the water storage layer and the foundation;
the top of the permeable layer is provided with an auxiliary mounting body;
the inside of aquifer is fixed with leads to water subassembly.
3. An energy-saving drainage pavement for planning sponge cities as claimed in claim 2, wherein: the auxiliary installation body comprises:
the positioning blocks are of a square plate-shaped structure with isosceles trapezoid cross sections and are arranged at the tops of the auxiliary mounting bodies in an annular mode;
the limiting body is of a rectangular block structure, four water guide grooves are annularly arranged on the limiting body, and the limiting body is fixedly arranged in the middle of the top of the auxiliary mounting body;
the splice block, the splice block adopts the rectangular plate structure that the bilateral symmetry in both ends was amputated around, and the top outside of splice block is the inclined groove that the annular arrangement was provided with L shape, and this inclined groove bottom and the cut groove intercommunication of cutting on the supplementary installation body, and the bottom of splice block is the annular arrangement and is provided with the constant head tank, and the locating piece can be embedded into the inboard of constant head tank.
4. An energy-saving drainage pavement for planning sponge cities as claimed in claim 3, wherein: the auxiliary installation body comprises:
the auxiliary installation bodies and the splicing blocks are of square structures, the length and width of the auxiliary installation bodies are smaller than those of the splicing blocks, and in an installation state, intervals are formed between the auxiliary installation bodies;
the side mounting block is half of the auxiliary mounting body after cutting, and the length of the side mounting block is the same as the length and the width of the splicing block.
5. An energy-saving drainage pavement for planning sponge cities as claimed in claim 2, wherein: the subassembly that leads to water includes:
the water passing assembly is of a plate-shaped structure with a semicircular vertical section, the top of the water passing assembly is provided with water seepage holes in a fan-shaped arrangement at equal intervals, one side of the water passing assembly is provided with three circular positioning holes, the other side of the water passing assembly is provided with three circular bulges, and the circular bulges can be embedded into the inner sides of the positioning holes of the other water passing assembly;
the drainage piece is communicated with the sedimentation filter tank through a pipeline.
6. An energy-saving drainage pavement for planning sponge cities as claimed in claim 5, wherein: the subassembly that leads to water includes:
drainage, drainage adopt with leading to the same semicircular platelike structure of water subassembly, and one side of drainage is provided with the location spread groove, inside circular protruding imbedding the location spread groove, the other end of drainage is provided with circular location arch, this circular location arch can be imbedded in the locating hole of leading to the water subassembly inboard, and both ends symmetry is provided with the drainage connector around the drainage, drainage accessible pipeline communicates each other.
7. An energy-saving drainage pavement for planning sponge cities as claimed in claim 5, wherein: the sedimentation filtering tank adopts a rectangular shell mechanism, a baffle is arranged at the middle position in the sedimentation filtering tank, communication holes are formed in the baffle at equal distances, the pipeline of the drainage piece is communicated with the middle position of the lower part of the sedimentation filtering tank, and the communication holes are symmetrically formed in the left and right sides of the top of the sedimentation filtering tank.
8. An energy-saving drainage pavement for planning sponge cities as claimed in claim 7, wherein: the sedimentation filter tank comprises:
the water storage tank adopts a rectangular shell structure, two water storage tanks are symmetrically arranged on the front and back of each sedimentation filter tank, a water outlet is formed in one side of the top of the water storage tank, an L-shaped water drainage pipe is arranged on one side of the bottom of the water storage tank and penetrates through a road surface, and one side of the top of the water storage tank is connected with a communication hole in the top of the sedimentation filter tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121455475.1U CN215252090U (en) | 2021-06-29 | 2021-06-29 | Energy-conserving drainage road surface of sponge city planning usefulness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121455475.1U CN215252090U (en) | 2021-06-29 | 2021-06-29 | Energy-conserving drainage road surface of sponge city planning usefulness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215252090U true CN215252090U (en) | 2021-12-21 |
Family
ID=79484760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121455475.1U Active CN215252090U (en) | 2021-06-29 | 2021-06-29 | Energy-conserving drainage road surface of sponge city planning usefulness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215252090U (en) |
-
2021
- 2021-06-29 CN CN202121455475.1U patent/CN215252090U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108612172B (en) | Sponge urban rainwater collection irrigation system | |
| CN103548601B (en) | Tree pool and method for filtering runoff rainwater through tree pool | |
| CN109024833B (en) | Drainage system of sponge city and construction method thereof | |
| KR101488139B1 (en) | Nonpower roadside tree watering system using rain water | |
| CN113080025A (en) | Farmland construction circulating irrigation structure and construction method thereof | |
| CN206635863U (en) | A kind of rainwater purification is regulated and stored system | |
| KR101656036B1 (en) | Rainwater infiltration and catchment induction pipeline implantable unit and rainwater utilization system using the same | |
| CN215252090U (en) | Energy-conserving drainage road surface of sponge city planning usefulness | |
| EP4071307A1 (en) | Farmland irrigation and drainage system | |
| CN209482092U (en) | Suitable for the sponge city system of biological stranded belt is arranged outside town road red line | |
| CN108589463B (en) | Sponge city irrigation equipment that catchments | |
| CN216474335U (en) | A foundation structure for installing night light ceramic tile that permeates water | |
| CN214070796U (en) | Ecological slope greening device for landscape engineering | |
| CN108265894A (en) | Look for slope ditching type drainage system | |
| CN210163920U (en) | Landscaping protection slope | |
| CN211341053U (en) | Subside formula greenery patches structure of subregion drainage | |
| CN209941838U (en) | Drainage treatment structure of rainwater inspection shaft | |
| CN113089800A (en) | Municipal road drainage structure and drainage method and construction method thereof | |
| CN210482782U (en) | Roof inlet for stom water stagnates and holds device | |
| CN219385870U (en) | Sand-based permeable curb capable of preventing freezing | |
| CN216551402U (en) | Concrete pavior brick permeates water | |
| CN218756838U (en) | Town road waterproof construction | |
| CN220827868U (en) | Drainage tank | |
| CN216973108U (en) | Drainage structures is irrigated to pedestrian bridge flower groove | |
| CN211036615U (en) | Urban planning ground rainwater seepage device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |