CN208363256U - A kind of sectional type push-and-pull sliding added cover for sewage pool film enclosed hood - Google Patents
A kind of sectional type push-and-pull sliding added cover for sewage pool film enclosed hood Download PDFInfo
- Publication number
- CN208363256U CN208363256U CN201820691357.2U CN201820691357U CN208363256U CN 208363256 U CN208363256 U CN 208363256U CN 201820691357 U CN201820691357 U CN 201820691357U CN 208363256 U CN208363256 U CN 208363256U
- Authority
- CN
- China
- Prior art keywords
- enclosed hood
- film enclosed
- overlay film
- castor
- truss
- 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
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
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/208—Off-grid powered water treatment
Landscapes
- Cleaning Or Clearing Of The Surface Of Open Water (AREA)
Abstract
The utility model belongs to sewage treatment and environment protection field, sliding added cover for sewage pool film enclosed hood is pushed and pulled more particularly to a kind of sectional type, including muti-piece laterally alternately arranged first overlay film enclosed hood and the second overlay film enclosed hood, first overlay film enclosed hood and the second overlay film enclosed hood can be overlapped or divide right and left up and down under power effect, and the front and rear sides of the first overlay film enclosed hood is separately installed with film cloth of holding court from behind a screen;The sectional type enclosed hood does not need fully open entire enclosed hood during dredging, and during making dredging, exhaust outlet is small, capacity is few, and the influence to ambient enviroment is smaller, once some overlay film enclosed hood has damage, directly replace, it does not need to replace entire seal closure, structure is simple, easy to operate, long service life, and whole operation process does not have to be repeatedly opened and collapse cover film, and cost of investment is low, suitable for large-scale promotion.
Description
Technical field
The utility model belongs to sewage treatment and environment protection field, and in particular to a kind of sectional type push-and-pull sliding added cover for sewage pool
Film enclosed hood.
Background technique
With the continuous improvement of people's living standards, living environment pay attention to day by day of the common people for oneself, government is to this side
The control in face is increasingly strict, and especially Industrial Waste Water Treatments factory must be purified.Previous cesspool be all it is outdoor, now
Need to cesspool carry out closed processes, prevent the foul smell in cesspool from spreading around, the effective way of closed processes be by
Added cover for sewage pool is closed.But for coal chemical industry gas making circulating sewage pond, cesspool mud is often cleared up, at present coalification industrial and commercial bank
Industry generallys use the mud in driving+grab bucket operation mode cleaning gas making circulating sewage pond, if driving+grab bucket is all enclosed in
Film covers in space, and the high temperature corrosive gas that cesspool generates can heavy corrosion driving and grab bucket.
Existing added cover for sewage pool film enclosed hood currently on the market has totally-enclosed structure and non-totally-enclosed structure, totally-enclosed
Structure not only causes very big corrosion to the equipment in being enclosed in, and operator will also work in rugged environment, there is poison gas
Body to operator there is a great harm for, while the investment of totally-enclosed structure is big, and the ventilation air quantity of exhaust-gas treatment also can be very big, after
Emission-control equipment investment is big, and operating cost is high, and maintenance is big.The added cover for sewage pool film enclosed hood of non-totally-enclosed structure is as applied
Number a kind of free non-totally-enclosed structure of reciprocation type added cover for sewage pool film enclosed hood, the structure institute are disclosed for 201620756441.9
The cover film stated needs frequent opening and gathering;Application No. is disclosing in 201520059809.1, a kind of compression level is sliding
Dynamic added cover for sewage pool film enclosed hood, including cover film, support frame, which includes well pulley and guide rail, but passes through pulley
Make support frame that cover film be driven to open and collapse, this structure needs frequent opening and collapses cover film, and cover film is easily lost,
Service life is short, and support frame and pulley quantity are more, causes total complicated, maintenance task weight.It is needed thus to the prior art
It is simple to improve a structure of design, it is easy to operate, it is closed without the added cover for sewage pool film for being repeatedly opened and collapsing cover film
Cover.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides that a kind of structure is simple, easy to operate sectional type push-and-pull
Slide added cover for sewage pool film enclosed hood.
The technical solution adopted in the utility model is as follows:
A kind of blocked push-and-pull type level slides added cover for sewage pool film enclosed hood, including muti-piece laterally alternately arranged first covers
Film enclosed hood and the second overlay film enclosed hood, the first overlay film enclosed hood and the second overlay film enclosed hood move horizontally reality under power effect
It is now overlapped or divides right and left up and down, the front and rear sides of the first overlay film enclosed hood is separately installed with film cloth of holding court from behind a screen.
Preferably, above-mentioned blocked push-and-pull type level slides added cover for sewage pool film enclosed hood, the main body of the first overlay film enclosed hood
Structure includes upper truss and overlays on the upper cover film on truss, and the main structure of the second overlay film enclosed hood includes lower truss and covers
Lower cover film on lower truss.
Preferably, above-mentioned blocked push-and-pull type level slides added cover for sewage pool film enclosed hood, in the upper of the first overlay film enclosed hood
Truss arranged on left and right sides bottom is separately installed with outer castor, and the truss arranged on left and right sides bottom of lower cover film enclosed hood is separately installed with
Interior castor, is separately installed with double guide rail structures on the two sides side wall of cesspool, and the double guide rail structures include interior guide rail and outer
Guide rail, the outer castor are placed in outer guide, and the interior castor is placed in interior guide rail.
Preferably, above-mentioned blocked push-and-pull type level slides added cover for sewage pool film enclosed hood, the upper purlin of the first overlay film enclosed hood
Frame two sides are equipped with lateral castor.
Preferably, above-mentioned blocked push-and-pull type level slides added cover for sewage pool film enclosed hood, the lower truss of lower covering enclosed hood
Downside is provided with tension device.
Preferably, above-mentioned blocked push-and-pull type level slides added cover for sewage pool film enclosed hood, and the tension device is drawstring.
Preferably, above-mentioned blocked push-and-pull type level slides added cover for sewage pool film enclosed hood, the upper truss and lower truss
For belfast truss structure.
Preferably, above-mentioned blocked push-and-pull type level slides added cover for sewage pool film enclosed hood, the outer castor and interior castor
For direction-caster.
Preferably, above-mentioned blocked push-and-pull type level slides added cover for sewage pool film enclosed hood, the outer castor and interior castor
It is electrically connected respectively with driving motor, the driving motor is electrically connected with PLC control system.
Compared with prior art, the utility model has following innovative point:
The utility model will entirely cover film enclosed hood piecemeal arrangement, be divided into it is multiple power effect under can be overlapped up and down or
The the first overlay film enclosed hood and the second overlay film enclosed hood divided right and left, the first overlay film enclosed hood and the second overlay film enclosed hood or so point
When opening, realizing can be to sewage when the first overlay film enclosed hood and the second overlay film enclosed hood are overlapped up and down to the closed of entire cesspool
Pond carries out dredging or other operations, and during dredging, when to some specific position dredging, will be located at side in this position
The first overlay film enclosed hood or the second overlay film enclosed hood push and pull to the left or to the right, after dredging, by the first overlay film enclosed hood or
Second overlay film enclosed hood restores to the original state, therefore fully open entire enclosed hood is not needed during dredging, makes dredging process
In, exhaust outlet is small, and capacity is few, and the influence to ambient enviroment is smaller, once some overlay film enclosed hood has damage, directly replacement is
Can, it does not need to replace entire seal closure, structure is simple, easy to operate, long service life, and whole operation process does not have to repeatedly
Cover film is opened and collapses, cost of investment is low, suitable for large-scale promotion.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of sectional type described in the utility model push-and-pull sliding added cover for sewage pool film enclosed hood;
Fig. 2 is that the sectional type push-and-pull sliding cesspool described in the utility model removed after upper cover film and lower cover film adds
The structural schematic diagram of epiphragma enclosed hood;
Fig. 3 is the top view of Fig. 1 described in the utility model;
Fig. 4 is the top view of Fig. 2 described in the utility model;
Fig. 5 is the front view or main view of Fig. 1 described in the utility model;
Fig. 6 is the front view or main view of Fig. 2 described in the utility model;
Fig. 7 is the left view of Fig. 1 described in the utility model;
Fig. 8 is enlarged drawing at the A of Fig. 7 described in the utility model;
Fig. 9 is enlarged drawing at the B of Fig. 7 described in the utility model.
Specific embodiment
The detailed content and its specific embodiment of the utility model are further illustrated with reference to the accompanying drawing.
Embodiment
As shown in figs 1-9, a kind of blocked push-and-pull type level slides added cover for sewage pool film enclosed hood, including muti-piece transverse direction is alternately
The the first overlay film enclosed hood 1 and the second overlay film enclosed hood 2 of arrangement, the first overlay film enclosed hood 1 and the second overlay film enclosed hood 2 are in power
It moves horizontally realization under effect to be overlapped or divide right and left up and down, the front and rear sides of the first overlay film enclosed hood 1, which is separately installed with, holds court from behind a screen
Film cloth 3.
Blocked push-and-pull type level sliding added cover for sewage pool film enclosed hood described in the utility model is lateral by design muti-piece
Alternately arranged first overlay film enclosed hood 1 and the second overlay film enclosed hood 2, and the first overlay film enclosed hood 1 and the second overlay film enclosed hood 2
It can be overlapped or divide right and left up and down under power effect, when needing to carry out dredging operation to cesspool, under the action of power
As manually or mechanically driven the first overlay film enclosed hood 1 and the second overlay film to be overlapped up and down, after dredging, the left and right under power effect
It separates, realizes that the first overlay film enclosed hood 1 and the second overlay film enclosed hood 2 are connecting in order to prevent to totally-enclosed at the top of cesspool
Synapsis is poorly sealed, is separately installed with hold court from behind a screen film cloth 3 (as shown in Fig. 1 and Fig. 9) in the front and rear sides of the first overlay film enclosed hood 1,
The material of film cloth 3 of holding court from behind a screen is film cloth, and film cloth has water-proof sunshade, and fastness is good, anti-corrosion, acid-proof, corrosion-resistant, and in a certain range
Can arbitrarily stretch, the vertical cloth of film cloth 3 of holding court from behind a screen setting in the first overlay film enclosed hood 1 and the second overlay film enclosed hood 2 among, can play
Closed effect.The utility model will entirely cover film enclosed hood piecemeal arrangement, be divided into it is multiple power effect under can weigh up and down
The first overlay film enclosed hood 1 and the second overlay film enclosed hood 2 folded or divide right and left, the first overlay film enclosed hood 1 and the second overlay film are closed
When cover 2 is divided right and left, realize to the closed of entire cesspool, the first overlay film enclosed hood 1 and the overlapping of the second about 2 overlay film enclosed hood
When, dredging or other operations can be carried out to cesspool, and during dredging, when to some specific position dredging, by position
In the first square in this position overlay film enclosed hood 1 or the second push-and-pull to the left or to the right of overlay film enclosed hood 2, after dredging, by the
One overlay film enclosed hood 1 or the second overlay film enclosed hood 2 restore to the original state, therefore do not need during dredging fully open entire close
Cover is closed, during making dredging, exhaust outlet is small, and capacity is few, and the influence to ambient enviroment is smaller.
Specifically, in above-described embodiment, the main structure of the first overlay film enclosed hood 1 includes upper truss 101 and overlays on purlin
Upper cover film 102 on frame 101, the main structure of the second overlay film enclosed hood 2 include lower truss 201 and overlay on lower truss 201
Lower cover film 202.Further specifically, the upper truss 101 and lower truss 201 are belfast truss structure.(this is practical new
Upper truss 101 and lower truss 201 described in type are belfast truss structure, and truss herein is one kind of support frame, play support
Effect)
Specifically, it in above-described embodiment, is installed respectively in the 101 arranged on left and right sides bottom of upper truss of the first overlay film enclosed hood 1
There is outer castor 602, the 201 arranged on left and right sides bottom of truss of lower cover film enclosed hood 2 is separately installed with interior castor 601, cesspool 4
Two sides side wall on be separately installed with double guide rail structures, the double guide rail structures include that interior guide rail 502 and outer guide 501 are (double
Guide rail structure is connected by screw with cesspool side wall, while supporting beam 11 is provided with below double guide rail structures), described is outer
Castor 602 is placed in outer guide 501, and the interior castor 601 is placed in interior guide rail 502.The outer guide 501 and interior guide rail
502 be groove-like, and outer castor 602 and interior castor 601 are inlayed wherein respectively, and castor is facilitated to move along guide rail, can effectively be kept away
Exempt from the offset of castor, used interior castor 601 and outer castor 602 are industrial heavy castor, can carry truss 101 or under
The weight of truss 201, generally upper truss 101 and lower truss 201 use steel material, are typically chosen the good carbon steel material of antiseptic property
Matter, furthermore interior castor 601 and outer castor 602 are coated with rubber material, can be avoided interior castor 601 and outer castor 602 is being transported
It is deviated during row, increases the frictional force between interior castor 601 and outer castor 602 and guide rail, while rubber-coated material, it can
It plays anti-corrosion, extend the effect of service life.The outer castor 602 of the structure and interior castor 601 are able to drive the enclosed hood of piecemeal in guide rail
Upper walking drives the sliding of monolithic enclosed hood, enclosed hood can be made open and close in real time, enclosed hood is enable to move horizontally,
Convenient for daily care and maintenance, which effectively prevents losing for membrane material, maintains the integrality of cover film.Further tool
Body, 2 liang of side bottoms of one piece of first overlay film enclosed hood 1 or the second overlay film enclosed hood are respectively provided with 6 outer castors 602 or interior castor
601, and outer castor 602 and interior castor 601 are direction-caster, glide direction is fixed, in power (manpower or external driving device)
It can be slided on interior guide rail 502 or outer guide 501 under effect.
Specifically, the upper cover film 102 and lower cover film 202 use lightweight sewage special anti-corrosion film, generally use
The cured PVC film material of UV, lightweight, tensile strength is big, tear-proof, and PVC coating is coated on substrate, is coated with UV on PVC coating
Light solidifying coating covers lightweight sewage special anti-corrosion film to strengthen, while having anti-corrosion effect.
Specifically, in above-described embodiment, as shown in Figure 7, Figure 8,101 two sides of upper truss of the first overlay film enclosed hood 1 are installed
There is lateral castor 8.Specifically, vertical limit plate 10 is being welded on 4 side of cesspool, lateral castor 8 with vertical by limiting
Position plate 10 is arranged vertically and (is in a horizontal state, can be using fixing axle as circular rotatable), lateral castor 8 and the first overlay film enclosed hood 1
The side bottom flat contact of upper truss 101, when upper truss 101 is by the power stretched to two sides, active force is acted on laterally
On castor 8, lateral castor 8 is driven to rotate, the active force being inwardly compressed is generated to upper truss 101 in the rotation of lateral castor 8, into
And the active force that balance crane is stretched to two sides can subtract in addition, what lateral castor 8 generated upper truss 101 is rolling action power
Few abrasion to upper 101 side wall of truss.
Specifically, in above-described embodiment, tension device 12 is provided on the downside of the lower truss 201 of lower covering enclosed hood 2.Specifically
Ground, the tension device 12 are drawstring.Tension device 12 generates inside pulling force to lower truss 201, can effectively avoid down
Truss 201 expands outwardly.
Specifically, in above-described embodiment, the outer castor 602 and interior castor 601 are direction-caster.
Specifically, in above-described embodiment, the outer castor 602 and interior castor 601 are electrically connected with driving motor 7 respectively,
The driving motor 7 is electrically connected with PLC control system.
Specifically, above-mentioned enclosed hood, block design are not easy to lose membrane material, simple and compact, and security performance is high, divide before installation
Block production, after completing, monolith lifting debugging, convenient, flexible stabilization, supporting frame with steel structure and cover film piecemeal group become one
Body, membrane material are strained and fixed on supporting frame with steel structure, and membrane material will not often be lost, long service life, and security performance is high.
The above-mentioned description to embodiment is for that can understand and apply this practical convenient for those skilled in the art
It is novel.Person skilled in the art obviously easily can make various modifications to these embodiments, and illustrating herein
General Principle be applied in other embodiments without having to go through creative labor.Therefore, the utility model is not limited to here
Embodiment, those skilled in the art's announcement according to the present utility model do not depart from the improvement that the utility model scope is made
It should be all within the protection scope of the utility model with modification.
Claims (9)
1. a kind of blocked push-and-pull type level slides added cover for sewage pool film enclosed hood, which is characterized in that laterally alternately arranged including muti-piece
The the first overlay film enclosed hood (1) and the second overlay film enclosed hood (2) of column, the first overlay film enclosed hood (1) and the second overlay film enclosed hood (2)
It moves horizontally realization under power effect to be overlapped or divide right and left up and down, the front and rear sides of the first overlay film enclosed hood (1) is pacified respectively
Equipped with hold court from behind a screen film cloth (3).
2. blocked push-and-pull type level according to claim 1 slides added cover for sewage pool film enclosed hood, which is characterized in that first
The main structure of overlay film enclosed hood (1) includes upper truss (101) and overlays on the upper cover film (102) on truss (101), and second
The main structure of overlay film enclosed hood (2) includes lower truss (201) and overlays on the lower cover film (202) on lower truss (201).
3. blocked push-and-pull type level according to claim 2 slides added cover for sewage pool film enclosed hood, which is characterized in that the
Upper truss (101) arranged on left and right sides bottom of one overlay film enclosed hood (1) is separately installed with outer castor (602), the second overlay film enclosed hood
(2) truss (201) arranged on left and right sides bottom is separately installed with interior castor (601), is pacified respectively on the two sides side wall of cesspool (4)
Equipped with double guide rail structures, the double guide rail structures include interior guide rail (502) and outer guide (501), the outer castor (602)
It is placed in outer guide (501), the interior castor (601) is placed in interior guide rail (502).
4. blocked push-and-pull type level according to claim 3 slides added cover for sewage pool film enclosed hood, which is characterized in that first
Upper truss (101) two sides of overlay film enclosed hood (1) are equipped with lateral castor (8).
5. blocked push-and-pull type level according to claim 3 slides added cover for sewage pool film enclosed hood, which is characterized in that second
Tension device (12) are provided on the downside of the lower truss (201) of overlay film enclosed hood (2).
6. blocked push-and-pull type level according to claim 5 slides added cover for sewage pool film enclosed hood, which is characterized in that described
Tension device (12) be drawstring.
7. blocked push-and-pull type level according to claim 2 slides added cover for sewage pool film enclosed hood, which is characterized in that described
Upper truss (101) and lower truss (201) be belfast truss structure.
8. blocked push-and-pull type level according to claim 3 slides added cover for sewage pool film enclosed hood, which is characterized in that described
Outer castor (602) and interior castor (601) be direction-caster.
9. blocked push-and-pull type level according to claim 8 slides added cover for sewage pool film enclosed hood, which is characterized in that described
Outer castor (602) and interior castor (601) be electrically connected respectively with driving motor (7), the driving motor (7) and control system
Electrical connection.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201820691357.2U CN208363256U (en) | 2018-05-10 | 2018-05-10 | A kind of sectional type push-and-pull sliding added cover for sewage pool film enclosed hood |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201820691357.2U CN208363256U (en) | 2018-05-10 | 2018-05-10 | A kind of sectional type push-and-pull sliding added cover for sewage pool film enclosed hood |
Publications (1)
Publication Number | Publication Date |
---|---|
CN208363256U true CN208363256U (en) | 2019-01-11 |
Family
ID=64934104
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201820691357.2U Active CN208363256U (en) | 2018-05-10 | 2018-05-10 | A kind of sectional type push-and-pull sliding added cover for sewage pool film enclosed hood |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN208363256U (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109772844A (en) * | 2019-02-27 | 2019-05-21 | 徐工集团工程机械股份有限公司科技分公司 | Auto-folder rotating welding smoke and dust treatment cover |
CN110284583A (en) * | 2019-06-15 | 2019-09-27 | 上海华喜膜结构工程有限公司 | A kind of open-close type cesspool seal closure |
CN114074961A (en) * | 2020-08-19 | 2022-02-22 | 碧空环境科技有限公司 | Membrane adds bottom prevention of seepage and water conservancy diversion structure |
-
2018
- 2018-05-10 CN CN201820691357.2U patent/CN208363256U/en active Active
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109772844A (en) * | 2019-02-27 | 2019-05-21 | 徐工集团工程机械股份有限公司科技分公司 | Auto-folder rotating welding smoke and dust treatment cover |
CN110284583A (en) * | 2019-06-15 | 2019-09-27 | 上海华喜膜结构工程有限公司 | A kind of open-close type cesspool seal closure |
CN114074961A (en) * | 2020-08-19 | 2022-02-22 | 碧空环境科技有限公司 | Membrane adds bottom prevention of seepage and water conservancy diversion structure |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN208363256U (en) | A kind of sectional type push-and-pull sliding added cover for sewage pool film enclosed hood | |
CN203263305U (en) | Wall robot cleaner | |
CN103422480A (en) | Method and device for stream guidance and enrichment of blue-green algae in large water area | |
CN103233506B (en) | Trailing type added cover for sewage pool film seal closure | |
CN203188356U (en) | Following-type cesspool capping membrane sealing cover | |
CN205688564U (en) | Construction site rainwater reuse device | |
CN209443579U (en) | A kind of steel construction greenhouse for contaminated soil remediation | |
CN202683071U (en) | Covering and deodorization integrated device | |
CN205894266U (en) | Free to -and -fro effluent water sump adds epiphragma enclosed hood | |
CN208965703U (en) | High-intensitive cesspool seals covered film structure | |
CN211707685U (en) | Rain-proof air draft device | |
CN207392420U (en) | A kind for the treatment of tank is capped deodorization seal closure | |
CN212224171U (en) | Telescopic follow-up type reverse film hanging device synchronously running with sedimentation tank mud scraper | |
CN210713174U (en) | Sectional push-pull type sewage pool capping device | |
CN103526825A (en) | Novel feces suction truck | |
CN209258346U (en) | A kind of cultivation mobile platform for seawall, inland lake, river course clear up and transported material | |
CN204983130U (en) | Initiative rotation type steel skeleton supports anti - fluorine carbon fiber membrane effluent water sump sealed cowling that hangs | |
CN220351749U (en) | Sliding type membrane structure sealing cover with good sealing performance for sewage tank | |
CN204709887U (en) | For coordinating the push-and-pull capping apparatus of mud scraper on aerated grit chamber | |
CN211275840U (en) | Prevent tectorial membrane gas collecting system of leakage | |
CN214939913U (en) | Novel bed type hydraulic flap gate | |
CN215049398U (en) | Aerated grit chamber capping and sealing device | |
CN218166056U (en) | Odor sealing mechanism suitable for sewage plant grit chamber | |
CN206971297U (en) | A kind of Novel water conservancy project Accrete clearing device | |
CN217613303U (en) | Unpowered town sewage high efficiency processing device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant |