CN109610265A - A kind of buried town squares rain water collecting system - Google Patents
A kind of buried town squares rain water collecting system Download PDFInfo
- Publication number
- CN109610265A CN109610265A CN201811384540.9A CN201811384540A CN109610265A CN 109610265 A CN109610265 A CN 109610265A CN 201811384540 A CN201811384540 A CN 201811384540A CN 109610265 A CN109610265 A CN 109610265A
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- China
- Prior art keywords
- brick
- ponding
- aquifer
- buried
- river
- 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.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
- E01C11/225—Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/02—Methods or installations for obtaining or collecting drinking water or tap water from rain-water
-
- 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
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/108—Rainwater harvesting
-
- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Road Paving Structures (AREA)
- Sewage (AREA)
Abstract
The invention discloses a kind of buried town squares rain water collecting systems, are related to municipal works technical field, solve the mouth of a river and are opened in floor tile plane the technical issues of influencing pedestrian's walking motion.Technical points include the floor tile for being layed in square ground, the aquifer being arranged under the floor tile and the reservoir positioned at pipeline connection below aquifer, the floor tile includes several plane bricks and several ponding bricks, several plane bricks are laid with around ponding brick side, the ponding brick is in bowl-shape setting, its side wall is in the inclined inclined surface of plane brick, the mouth of a river was offered on the inclined side peripheral wall of ponding brick, the mouth of a river excessively is connected to aquifer through ponding brick side wall, and the present invention has the advantages that guarantee pedestrian's walking motion effect.
Description
Technical field
The present invention relates to municipal works technical fields, more specifically, it relates to a kind of buried town squares rainwater-collecting
System.
Background technique
In daily life in order to enhance the water circulation ability in sponge city and alleviate municipal drainage pressure, city is reduced
The generation of effectiveness factors, it is often sharp again for collecting rainwater drainage in the broad square ground of road or area and underground setting
Rain water collecting system, by the rainwater dropped down on ground is drained in the containment structures of underground and to external drainage it is sharp again
With the effect that enhancing rain water collecting system recycles the rainwater on ground.
It is similar to above-mentioned rain water collecting system, in the prior art in order to enhance the infiltration collecting effect to rainwater on ground
It is usually chosen in the mouth of a river of crossing for opening up on floor tile and passing through ground for rainwater and promotes rain while guarantee floor tile is as ground supports
Water passed through the collection efficiency that the mouth of a river flows into underground gathering apparatus.But the existing mouth of a river of crossing is arranged on the horizontal plane of floor tile,
The setting that the mouth of a river is crossed under no ponding environment is likely to occur the article of pedestrian and surprisingly tumbles in the mistake mouth of a river or causing high-heeled shoes
Influence the walking effect of pedestrian the case where such as heel clamping, be unfavorable for the walking effect of pedestrian.
Summary of the invention
Problem in view of the prior art, the purpose of the present invention is to provide a kind of buried town squares rain water collecting system,
It has the advantages that guarantee pedestrian's walking motion effect.
To achieve the above object, the present invention provides the following technical scheme that a kind of buried town squares rain water collecting system,
Including the floor tile for being layed in ground, the aquifer being arranged under the floor tile and the storage connected positioned at pipeline below aquifer
Pond, the floor tile include several plane bricks and several ponding bricks, and several plane bricks are laid with around ponding brick side, institute
Ponding brick is stated in bowl-shape setting, side wall is in open up on the inclined side peripheral wall of ponding brick to the inclined inclined surface of plane brick
There is the mouth of a river, the mouth of a river excessively is connected to aquifer through ponding brick side wall.
By using above-mentioned technical proposal, the rainwater on square ground converges into ponding brick by plane brick, then passes through
The mouth of a river of crossing on ponding brick side wall flows into aquifer, is finally pooled to collection water conservancy diversion in reservoir and is recycled.Ponding
Brick is in bowl-shape setting, while enhancing to rainwater catchment effect, is set on the side wall being obliquely installed due to crossing the mouth of a river, so that mistake
The mouth of a river is mutually separated with the track route of pedestrian, the influence for guaranteeing water flow convergence water conservancy diversion and the mouth of a river being avoided to walk pedestrian.
The present invention is further arranged to: the opening face for crossing the mouth of a river is in rectangular surfaces, and crosses the mouth of a river and be located at ponding brick side wall
Upper inclination opens up, and all side plane bricks of inclined direction direction are diagonally downward.
By using above-mentioned technical proposal, the mouth of a river, which is located to tilt on ponding brick side wall, excessively is opened up, so that rainwater was passing through
Momentum is generated by gravity when the mouth of a river, enhancing rainwater passed through the efficiency at the mouth of a river, to improve rainwater-collecting in reservoir
Efficiency.
The present invention is further arranged to: being provided with corrugated plating, one end of the corrugated plating on the opening face for crossing the mouth of a river
It was fixed on opening sidewalls of the mouth of a river far from ponding brick bottom surface.
By using above-mentioned technical proposal, the corrugated plating on mouth of a river opening face excessively is used to close the mouth of a river excessively, works as place
When non-rainy state, corrugated plating blocks under its own deformation power is crossing mouth of a river surface, places rubbish incidental and passed through the mouth of a river
It falls into aquifer；When assembling rain in ponding brick, rainwater generates buoyancy to corrugated plating and corrugated plating is gradually increasing, with
In ponding brick the raising of water level and be gradually opened.
The present invention is further arranged to: the bottom surface of the ponding brick offers relief port, and the opening face of the relief port is set
It sets and is connected with closure plate, closure plate side plate face is articulated with the opening sidewalls side of relief port, and closure plate by torsional spring
Closure is tightly attached to the bottom surface of ponding brick under the effect of torsion spring.
By using above-mentioned technical proposal, when the rainwater converged in ponding brick is more or rainfall is larger, rainwater
The active force that weight is greater than torsional spring is discharged directly to closure plate in aquifer rainwater.
The present invention is further arranged to: the side that the plane brick is located at ponding brick is provided with several underground lamps.
By using above-mentioned technical proposal, it is buried that the underground lamp of flat ponding brick side is used for label instruction when rather dark
The position of lamp avoids pedestrian from surprisingly treading in ponding brick in rather dark environment.
The present invention is further arranged to: the surface of the plane brick is provided with several guiding gutters extended on ponding brick.
By using above-mentioned technical proposal, guiding gutter on plane brick is used for dropping down onto the rainwater of square bottom surface to ponding brick
Drainage promotes rainwater-collecting efficiency.
The present invention is further arranged to: the aquifer is set between two neighboring ponding brick, and aquifer bottom layer
Face is obliquely installed, and diagonally downward towards the middle position between two neighboring ponding brick, the reservoir is located at inclined direction
Setting is connected at the low side position of aquifer.
By using above-mentioned technical proposal, aquifer bottom level is obliquely installed guarantor while for rainwater progress water conservancy diversion
The flow efficiency that rainwater flows into aquifer is demonstrate,proved, while also increasing reservoir to the capture range of rainwater.
The present invention is further arranged to: the connectivity part of the reservoir and aquifer is provided with adsorption filtration device.
By using above-mentioned technical proposal, adsorption filtration device is used to be filtered cleaning to the rainwater on square ground,
The cleannes for flowing into rainwater in reservoir are promoted, while conveniently being recycled to rainwater, also plays and reduces institute in reservoir
The effect being contaminated.
The present invention is further arranged to: several buffering edges, the buffering edge are provided in the bottom level of the aquifer
It is obliquely installed, inclined direction is tilted upward towards adjacent ponding brick side.
By using above-mentioned technical proposal, buffering along for buffering to the water flow flowed through on aquifer, work as by reduction
Souring power of the rainwater to adsorption filtration device when amount of rainfall is excessive.
The present invention is further arranged to: the reservoir close on be provided with and communicated on the side wall of the connectivity part of aquifer it is anti-
Only rainwater overflows the drainage tube of reservoir.
By using above-mentioned technical proposal, the drainage tube position on reservoir is lower than the connectivity part of reservoir and aquifer,
When the excessive rainfall put aside in reservoir, rainwater is drawn from drainage tube, and avoiding rainwater from being back in aquifer influences rainwater collection
Collection and drainage effect.
Compared with prior art, the beneficial effects of the present invention are:
(1) it is arranged by crossing the connection of aquifer in the mouth of a river and ground on setting ponding brick side wall, guarantees road pavement rainwater-collecting
While avoided the mouth of a river from impacting the walking of pedestrian；
(2) by the setting of corrugated plating and relief port on ponding brick, ponding brick is promoted to the drainage effect of rainwater；
(3) setting for passing through ponding brick side underground lamp is further ensured that the walking safety of pedestrian.
Detailed description of the invention
Fig. 1 is the structure sectional view of the present embodiment；
Fig. 2 is the configuration schematic diagram of floor tile in the present embodiment；
Fig. 3 is the enlarged diagram in Fig. 1 at A；
Fig. 4 is the enlarged diagram in Fig. 2 at B；
Fig. 5 is the structural schematic diagram of the present embodiment saliency ponding brick bottom.
Appended drawing reference: 1, floor tile；11, ponding brick；111, it is clamped edge；112, relief port；113, closure plate；114, torsional spring；
12, the mouth of a river is crossed；121, corrugated plating；122, floating portion；13, plane brick；131, clamping groove；132, underground lamp；133, guiding gutter；2,
Aquifer；21, connecting pipe；211, edge is buffered；22, adsorption filtration device；221, strainer；222, filtrate；3, reservoir；23,
Drainage tube.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention will be described in detail.
Embodiment, a kind of buried town squares rain water collecting system, as shown in Figure 1, including the ground for being layed in square bottom surface
Brick 1, the reservoir 3 being connect positioned at the aquifer 2 that 1 lower layer of floor tile is laid with positioned at 2 lower section pipeline of aquifer.Floor tile 1 includes product
Water brick 11 and the plane brick 13 for being located at the laying of 11 side of ponding brick, ponding brick 11 are obliquely installed in side wall to ponding brick 11 bowl-shape
Setting, offered the mouth of a river 12 on the sloped sidewall of ponding brick 11, and the rainwater in ponding brick 11 passed through the inflow of the mouth of a river 12
Aquifer 2 is simultaneously finally collected to reservoir 3.
As shown in Figure 1, 2,13 parallelogram of the plane brick setting in the present embodiment, the horizontal cross-section of ponding brick 11 is in
Diamond shape, side is identical as the long side length of ponding brick 11, and the long bevel edge of plane brick 13 fits in the side of ponding brick 11, and product
The sidewall bottom horizontal extension of water brick 11 has clamping along 111, and plane brick 13 closes on square along its length on the long side of ponding brick 11
The clamping groove 131 being clamped is bonded along 111 for being clamped to offering.Plane brick 13 is located at clamping and is clamped along 111 1 lateral edges along 111
Length direction is arranged at intervals with several underground lamps 132, and the interval location between underground lamp 132 is equipped with guiding gutter 133,
Guiding gutter 133 extends at the sidewall edge of ponding brick 11.
As shown in Figure 2,3, the opening face for crossing the mouth of a river 12 is in rectangular surfaces, offers water on four side walls of ponding brick 11
Mouthfuls 12, it crosses the mouth of a river 12 and is located on 11 side wall of ponding brick inclination through setting, inclined direction is towards the inclination of periphery side plane brick 13
It is down-set.It crosses on opening sidewalls of the mouth of a river 12 far from 11 bottom surface of ponding brick and is fixedly installed corrugated plating 121. in conjunction with Fig. 4, ripple
Plate 121, which closes on the side wall of 11 bottom surface of the ponding brick horizontal extension into ponding brick 11, floating portion 122, and floating portion 122 is in rectangle
Kickboard shape.The relief port 112 of rectangle is offered positioned at the bottom surface of ponding brick 11, and ponding brick 11 is located at the bottom of relief port 112
Opening face is provided with closure plate 113, and 113 side side wall of closure plate is rotatablely connected by torsional spring 114 with 112 side wall of relief port, is turned round
The elastic acting force of spring 114 blocks the fitting of closure plate 113 in 112 opening of relief port.
As shown in Figure 1, aquifer 2 is set between two adjacent ponding bricks 11, the two sides of aquifer 2 are connected to a pair of of ponding
Below brick 11, in the bottom level of aquifer 2 diagonally downward towards the middle position between two neighboring ponding brick 11, so that storing
The bottom surface layer V-type of water layer 2, positioned at the low side position of V-type, connection is fixed with columned connecting pipe 21.In the level of aquifer 2
It is equidistantly provided with buffering edge of several bufferings in 211, the present embodiment along its length perpendicular to the long side of reservoir 3
The 211 trigone strips being inclined to set, inclined direction are tilted upward towards 11 side of ponding brick that buffering is closed on along 211.
As shown in Figure 1, reservoir 3 is in cube shape, the center of top surface is connected to connecting pipe 21, connecting pipe 21
Interior clamping is provided with adsorption filtration device 22, and adsorption filtration device 22 is including several layers strainer 221 and is located at adjacent screen 221
Between the filtrate 222 filled, the filtrate 222 in the present embodiment selects fibrous nodules, shell filtrate, ceramic grain filter and cobble.It stores
Pond 3, which is closed on to be located on side wall of connecting pipe 21 below connecting pipe 21 at the top of it, is provided with drainage tube 23, and drainage tube 23 prolongs
It stretches and is connected to other water storage positions.
The course of work of the invention and have the beneficial effect that: when raining, the rainwater dropped down on square floor tile 1 imports ponding brick
In 11, when the water level in ponding brick 11 rose to 12 aperture position of the mouth of a river, corrugated plating 121 is opened by buoyancy, rainwater
By the mouth of a river 12 from 11 side wall of ponding brick flow out, by aquifer 2 finally import reservoir 3 in；When rainfall is larger, ponding
When the water collected in brick 11 is more, closure plate 113 is acted on overturning by rainwater weight and opens, and rainwater is arranged from 11 bottom of ponding brick
Out, aquifer 2 is also passed through to import in reservoir 3.It is arranged on 11 sloped sidewall of ponding brick by the way that the mouth of a river 12 will be crossed, is being guaranteed
While rainwater-collecting effect, the influence to pedestrian's walking motion is reduced.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of buried town squares rain water collecting system, including being layed in the floor tile (1) of square ground, being located at the floor tile
(1) aquifer (2) being arranged under and the reservoir (3) positioned at pipeline connection below aquifer (2), it is characterised in that: described
Floor tile (1) includes several plane bricks (13) and several ponding bricks (11), and several plane bricks (13) are around ponding brick (11)
Side is laid with, and the ponding brick (11) is in bowl-shape setting, and side wall is in be located at ponding brick to plane brick (13) inclined inclined surface
(11) it was offered on inclined side peripheral wall the mouth of a river (12), described the mouth of a river (12) excessively are connected to water storage through ponding brick (11) side wall
Layer (2).
2. a kind of buried town squares rain water collecting system according to claim 1, it is characterised in that: described to cross the mouth of a river
(12) opening face is in rectangular surfaces, and crosses the mouth of a river (12) and be located to tilt on ponding brick (11) side wall and open up, inclined direction direction
All side plane bricks (13) are diagonally downward.
3. a kind of buried town squares rain water collecting system according to claim 2, it is characterised in that: described to cross the mouth of a river
(12) it is provided on opening face corrugated plating (121), the mouth of a river (12) were fixed on far from ponding in one end of the corrugated plating (121)
On the opening sidewalls of brick (11) bottom surface.
4. a kind of buried town squares rain water collecting system according to claim 3, it is characterised in that: the ponding brick
(11) bottom surface offers relief port (112), and the opening face setting of the relief port (112) is connected with closure plate (113), described
Closure plate (113) side plate face is articulated with the opening sidewalls side of relief port (112), and closure plate (113) by torsional spring (114)
Closure is tightly attached to the bottom surface of ponding brick (11) under torsional spring (114) effect.
5. a kind of buried town squares rain water collecting system according to claim 1, it is characterised in that: the plane brick
(13) side positioned at ponding brick (11) is provided with several underground lamps (132).
6. a kind of buried town squares rain water collecting system according to claim 1, it is characterised in that: the plane brick
(13) surface is provided with several guiding gutters (133) extended on ponding brick (11).
7. a kind of buried town squares rain water collecting system according to claim 6, it is characterised in that: the aquifer
(2) it is set between two neighboring ponding brick (11), and aquifer (2) bottom level is obliquely installed, inclined direction is towards phase
Diagonally downward, the reservoir (3) is located at the low side position of aquifer (2) and connects in middle position between adjacent two ponding bricks (11)
Logical setting.
8. a kind of buried town squares rain water collecting system according to claim 7, it is characterised in that: the reservoir
(3) connectivity part of aquifer (2) is provided with adsorption filtration device (22).
9. a kind of buried town squares rain water collecting system according to claim 8, it is characterised in that: the aquifer
(2) several bufferings are provided in bottom level along (211), the buffering edge (211) is obliquely installed, and inclined direction is towards phase
Adjacent ponding brick (11) side tilts upward.
10. a kind of buried town squares rain water collecting system according to claim 1, it is characterised in that: the reservoir
(3) it closes on and is provided with and communicated with the drainage tube for preventing rainwater from overflowing reservoir (3) on the side wall of the connectivity part of aquifer (2)
(23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811384540.9A CN109610265B (en) | 2018-11-20 | 2018-11-20 | Bury municipal square rainwater collection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811384540.9A CN109610265B (en) | 2018-11-20 | 2018-11-20 | Bury municipal square rainwater collection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109610265A true CN109610265A (en) | 2019-04-12 |
| CN109610265B CN109610265B (en) | 2021-01-29 |
Family
ID=66004385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811384540.9A Active CN109610265B (en) | 2018-11-20 | 2018-11-20 | Bury municipal square rainwater collection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109610265B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608044A (en) * | 2020-05-29 | 2020-09-01 | 上海新园林实业有限公司 | A greening structure on both sides of the street that takes into account both drainage and road guidance |
| CN111733657A (en) * | 2020-07-20 | 2020-10-02 | 重庆大学 | Double-layer rainwater drainage ditch and its construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030127380A1 (en) * | 2000-10-05 | 2003-07-10 | Morris James F. | Suspended runoff water filter |
| JP2007308954A (en) * | 2006-05-18 | 2007-11-29 | Kamui Net:Kk | Gully unit for drainage and grating lid used therefor |
| DE102014113501A1 (en) * | 2014-09-18 | 2016-03-24 | Birco Gmbh | Drainage channel element |
| CN205617542U (en) * | 2016-03-16 | 2016-10-05 | 泉州博超实业有限公司 | That can collect rubbish prevents weighing down well lid |
| CN207175628U (en) * | 2017-09-06 | 2018-04-03 | 内蒙古和盛生态育林有限公司 | A kind of device collected rainwater and be used to afforest |
-
2018
- 2018-11-20 CN CN201811384540.9A patent/CN109610265B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030127380A1 (en) * | 2000-10-05 | 2003-07-10 | Morris James F. | Suspended runoff water filter |
| JP2007308954A (en) * | 2006-05-18 | 2007-11-29 | Kamui Net:Kk | Gully unit for drainage and grating lid used therefor |
| DE102014113501A1 (en) * | 2014-09-18 | 2016-03-24 | Birco Gmbh | Drainage channel element |
| CN205617542U (en) * | 2016-03-16 | 2016-10-05 | 泉州博超实业有限公司 | That can collect rubbish prevents weighing down well lid |
| CN207175628U (en) * | 2017-09-06 | 2018-04-03 | 内蒙古和盛生态育林有限公司 | A kind of device collected rainwater and be used to afforest |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608044A (en) * | 2020-05-29 | 2020-09-01 | 上海新园林实业有限公司 | A greening structure on both sides of the street that takes into account both drainage and road guidance |
| CN111733657A (en) * | 2020-07-20 | 2020-10-02 | 重庆大学 | Double-layer rainwater drainage ditch and its construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109610265B (en) | 2021-01-29 |
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Effective date of registration: 20240407 Address after: Room 309, No. 46 and 48, Siyingtang Lane, Wuma Street, Lucheng District, Wenzhou City, Zhejiang Province, 325000 Patentee after: Zhejiang Baoxiang Construction Co.,Ltd. Country or region after: China Address before: 325700 room 404, building 3, phase II, langang Huayuan, Dongping street, Dongtou District, Wenzhou City, Zhejiang Province (for office use only) Patentee before: WENZHOU JICHENG CONSTRUCTION Co.,Ltd. Country or region before: China |
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