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CN109647011A - A kind of Industrial Waste Water Treatments pond - Google Patents

A kind of Industrial Waste Water Treatments pond Download PDF

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Publication number
CN109647011A
CN109647011A CN201910050638.9A CN201910050638A CN109647011A CN 109647011 A CN109647011 A CN 109647011A CN 201910050638 A CN201910050638 A CN 201910050638A CN 109647011 A CN109647011 A CN 109647011A
Authority
CN
China
Prior art keywords
pond body
sliding slot
gear
rotating member
pond
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.)
Withdrawn
Application number
CN201910050638.9A
Other languages
Chinese (zh)
Inventor
不公告发明人
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Runjue Technology Co Ltd
Original Assignee
Ningbo Runjue Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ningbo Runjue Technology Co Ltd filed Critical Ningbo Runjue Technology Co Ltd
Priority to CN201910050638.9A priority Critical patent/CN109647011A/en
Publication of CN109647011A publication Critical patent/CN109647011A/en
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D21/00Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0006Settling tanks provided with means for cleaning and maintenance
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D21/00Separation of suspended solid particles from liquids by sedimentation
    • B01D21/02Settling tanks with single outlets for the separated liquid

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

The invention discloses a kind of Industrial Waste Water Treatments ponds, including pond body, the upper end of pond body is equipped with water inlet pipe, sewage draining exit is symmetrically arranged at left and right sides of pool bottom, the intermediate front and back of pond body is symmetrically arranged with first sliding groove, rack gear is equipped in first sliding groove up or down, rotating member is symmetrically arranged at left and right sides of upper end of the rack, rotating member is rotationally located at the front and back end of pond body, the side wall of rotating member is equipped with the tooth being engaged with rack, the side wall of rotating member is fixed with expansion plate, and the front and back end of pond body, which is symmetrically arranged with, holds expansion plate, the movable loose slot of rotating member.The present invention has the advantages that precipitate to a certain extent when can clean out automatically, clear up sediment again without exhausting sewage, allow sewage constantly precipitation process.

Description

A kind of Industrial Waste Water Treatments pond
Technical field
The present invention relates to environment protection field more particularly to a kind of Industrial Waste Water Treatments ponds.
Background technique
Processing to sewage, an important method is to carry out precipitating clarification using sedimentation basin, thus sediment from dirt It is removed in water, it is necessary to sediment processing be carried out to sedimentation basin, precipitate needs to clean to a certain extent, need to arrange sewage Manually sediment is cleared up again after falling, and sediment is gone out by a large amount of water, extends the process cycle to sediment, wave Take water resource and delays the work of sewage treatment.
So need a kind of Industrial Waste Water Treatments pond, precipitate to a certain extent when can clean out automatically, nothing Sewage need to be exhausted and clear up sediment again, allow sewage constantly precipitation process.
Summary of the invention
The main purpose of the present invention is to provide a kind of Industrial Waste Water Treatments pond, precipitate to a certain extent when can be with Automatically it cleans out, clears up sediment again without exhausting sewage, allow sewage constantly precipitation process.
To achieve the above objectives, the technical solution adopted by the present invention are as follows: a kind of Industrial Waste Water Treatments pond, including pond body, institute The upper end for stating pond body is equipped with water inlet pipe, is symmetrically arranged with sewage draining exit, the centre of the pond body at left and right sides of the pool bottom Front and back is symmetrically arranged with first sliding groove, is equipped with rack gear, the left and right two of the upper end of the rack up or down in the first sliding groove Side is symmetrically arranged with rotating member, and the rotating member is rotationally located at the front and back end of the pond body, the side wall of the rotating member be equipped with The tooth of the rack gear engagement, the side wall of the rotating member are fixed with expansion plate, and the front and back end of the pond body, which is symmetrically arranged with, holds institute Expansion plate, the movable loose slot of the rotating member are stated, is symmetrically arranged in the left and right sidewall of the pond body and the expansion plate phase The open-and-close mechanism of cooperation, the open-and-close mechanism are symmetrical arranged for opening, closing the sewage draining exit, the left and right sides of the rack gear There is the pushing mechanism being located at below the rotating member, the inside of the rear side of the pond body lower end is equipped with stepper motor, the stepping Be connected on the output shaft of motor and be located at the intracorporal transmission mechanism in the pond, the rack gear, the pushing mechanism with the biography The connection of motivation structure.
Further, the transmission mechanism includes the tooth group for the inside that front and back is symmetrically disposed in the pond body lower end, connection The tooth group of front and back two and the connecting shaft being connected on the output shaft of the stepper motor, the tooth group include being connected to the company Half gear in spindle, second gear, the second gear are meshed with the rack gear, and the right end of half gear is equipped with and institute The first gear that half gear matches is stated, is coaxially connected with turbine in the first gear.
Further, the pushing mechanism includes the push plate contacted with the intracorporal front-rear side walls in the pond, in the pond body Front-rear side walls be equipped with the second groove, the front and back end of the push plate be symmetrically fixed with move left and right and be not located at rotationally it is described Nut in second groove, the center of the nut are threaded with the reciprocating screw being rotationally located in second groove, The reciprocating screw is linked with first bevel gear close to the intermediate direction of the pond body, and the lower end of the first bevel gear is engaged with Second bevel gear, the center of the second bevel gear are linked with worm screw, and the worm screw is meshed with the turbine, first cone Gear, the second bevel gear, the worm screw are rotationally located in the pond body.
Further, the open-and-close mechanism includes the second sliding slot being located in the pond body side wall and is located at up or down The first skewback in the second sliding slot, the second sliding slot are connected with and the work towards the side in the pool center direction The connected board slot of dynamic slot, the lower end of the second sliding slot is connected with the third sliding slot being connected with the sewage draining exit, the sewage draining exit It is equipped with the 4th sliding slot close to the side of the pool center, is movably equipped in the third sliding slot, the 4th sliding slot Second skewback, is equipped with spring between second skewback and the third sliding slot, the upper and lower side of first skewback is respectively equipped with Top bevel, bottom inclined-plane, the centre of second skewback are equipped with the middle inclined-plane matched with the bottom inclined-plane, first skewback Top bevel is matched with the expansion plate.
Further, the expansion plate includes the first partition panel being fixed on the rotating member side wall, described first every It is equipped with the 5th sliding slot in disconnected plate, the second partition panel is equipped in the 5th sliding slot, it is sliding to be equipped with the 6th in second partition panel Slot, is equipped with the third partition panel matched with the top bevel of first skewback in the 6th sliding slot, the 5th sliding slot, The bottom of 6th sliding slot is equipped with electromagnet, and the end of the third partition panel is equipped with magnet.
The present invention has the advantages that precipitate to a certain extent when can clean out automatically, it is not necessary that sewage is arranged Fall and clear up sediment again, allows sewage constantly precipitation process.
Detailed description of the invention
Fig. 1 is structural schematic diagram according to the present invention;
Cross-sectional view when Fig. 2 is expansion plate according to the present invention elongation and stepper motor rotates counterclockwise half-turn;
Fig. 3 is cross-sectional view when sediment is released in push plate according to the present invention;
Cross-sectional view when Fig. 4 is push plate homing according to the present invention;
Fig. 5 is the A-A cross-sectional view of Fig. 1;
Fig. 6 is the portion the B enlarged drawing of Fig. 1;
Fig. 7 is the portion the C enlarged drawing of Fig. 2;
Fig. 8 is the portion the D enlarged drawing of Fig. 3;
Fig. 9 is the portion the E enlarged drawing of Fig. 4;
Figure 10 is the portion the F enlarged drawing of Fig. 3;
Figure 11 is the portion the G enlarged drawing of Fig. 5;
Figure 12 is the portion the H enlarged drawing of Fig. 5;
Figure 13 is the structural schematic diagram of expansion plate according to the present invention.
Specific embodiment
It is described below for disclosing the present invention so that those skilled in the art can be realized the present invention.It is excellent in being described below Embodiment is selected to be only used as illustrating, it may occur to persons skilled in the art that other obvious modifications.
As shown in figure 1 to figure 13, the upper end in a kind of Industrial Waste Water Treatments pond, including pond body 1, pond body 1 is equipped with water inlet pipe 2, It is symmetrically arranged with sewage draining exit 21 at left and right sides of 1 bottom of pond body, the intermediate front and back of pond body 1 is symmetrically arranged with first sliding groove, and first Rack gear 15 is equipped in sliding slot up or down, is symmetrically arranged with rotating member 4 at left and right sides of 15 upper end of rack gear, rotating member 4 is rotationally It is located at the front and back end of pond body 1, the side wall of rotating member 4 is equipped with the tooth engaged with rack gear 15, and the side wall of rotating member 4 is fixed with flexible Plate 3, the front and back end of pond body 1, which is symmetrically arranged with, holds expansion plate 3, the movable loose slot 16 of rotating member 4, right in the left and right sidewall of pond body 1 Title is provided with the open-and-close mechanism matched with expansion plate 3, and open-and-close mechanism is for opening, closing sewage draining exit 21, the left and right of rack gear 15 Two sides are symmetrically arranged with the pushing mechanism positioned at 4 lower section of rotating member, and the inside of the rear side of 1 lower end of pond body is equipped with stepper motor 18, The transmission mechanism being located in pond body 1 is connected on the output shaft of stepper motor 18, rack gear 15, pushing mechanism connect with transmission mechanism It connects.The lower end of the front side wall of pond body 1 is equipped with observation window.
Transmission mechanism includes the tooth group for the inside that front and back is symmetrically disposed in 1 lower end of pond body, connection front and back two tooth groups and bonded Connecting shaft 22 on the output shaft of stepper motor 18, tooth group include half gear 12 being connected in connecting shaft 22, second gear 13, second gear 13 is meshed with rack gear 15, and the right end of half gear 12 is equipped with the first gear 11 matched with half gear 12, the Turbine 10 is coaxially connected on one gear 11.
Pushing mechanism includes the push plate 17 contacted with the front-rear side walls in pond body 1, and the front-rear side walls in pond body 1 are equipped with the Two grooves, the front and back end of push plate 17 are symmetrically fixed with the nut 6 for moving left and right and not being located at rotationally in the second groove, nut 6 Center be threaded with the reciprocating screw 5 being rotationally located in the second groove, reciprocating screw 5 is close to the intermediate direction of pond body 1 It is linked with first bevel gear 7, the lower end of first bevel gear 7 is engaged with second bevel gear 8, and the center of second bevel gear 8 is linked with Worm screw 9, worm screw 9 are meshed with turbine 10, and first bevel gear 7, second bevel gear 8, worm screw 9 are rotationally located in pond body 1.
Open-and-close mechanism includes the second sliding slot being located in 1 side wall of pond body and be located in second sliding slot up or down first Skewback 19, second sliding slot are connected with the board slot being connected with loose slot 16 towards the side of 1 center position of pond body, under second sliding slot End is connected with the third sliding slot being connected with sewage draining exit 21, and sewage draining exit 21 is equipped with the 4th sliding slot, third close to the side at 1 center of pond body In sliding slot, the 4th sliding slot movably be equipped with the second skewback 20, between the second skewback 20 and third sliding slot be equipped with spring, first The upper and lower side of skewback 19 is respectively equipped with top bevel, bottom inclined-plane, and the centre of the second skewback 19 is equipped with oblique in matching with bottom inclined-plane The top bevel in face, the first skewback 19 is matched with expansion plate 3.
Expansion plate 3 includes the first partition panel being fixed on 4 side wall of rotating member, is equipped with the 5th sliding slot in the first partition panel, It is equipped with the second partition panel in 5th sliding slot, the 6th sliding slot is equipped in the second partition panel, is equipped in the 6th sliding slot with first tiltedly The third partition panel that the top bevel of block matches, the 5th sliding slot, the 6th sliding slot bottom be equipped with electromagnet, third partition panel End is equipped with magnet.
Its working principle is that: sewage to be processed enters from water inlet pipe, and after precipitating after a period of time, sediment is stayed in The bottom of pond body, it is clear that the water overflow stream that has handled to next process, by observation window sees that sediment slowly precipitates needs When reason, start stepper motor, stepper motor drives half gear of front and back side, second gear to rotate counterclockwise, and second gear drives Rack gear moves up, and the rotating member on the left of rack drives rotates counterclockwise, and the rotating member on the right side of rack drives rotates clockwise, together When half gear do not engaged with first gear, after stepper motor rotates half-turn, to pushing up, this hour rack do not engage rack gear with second gear But second gear continues to rotate rack gear is made not fall, rotating member is laid flat expansion plate, then to the first partition panel, second every The electromagnet of disconnected plate is powered, and the electromagnet of the first partition panel and the electromagnet of the second partition panel repel each other, the electromagnetism of the second partition panel The magnet of iron and third partition panel repels each other, and the side among the separate pond body of loose slot is stepped groove, as shown in Fig. 2, expansion plate The intracorporal sewage in pond is isolated up and down for elongation, and third partition panel enters in board slot, and third partition panel is oblique by the top of the first skewback Face moves down the first skewback, and the first skewback makes the second skewback by the bottom inclined-plane of the first skewback and the middle contact of incline plane of the second skewback To far from the direction movement among pond body, the second skewback opens sewage draining exit, and stepper motor continues to rotate, half gear and first gear Engagement, turbine rotation while first gear rotates, turbine drive worm screw to rotate, worm screw drive second bevel gear rotation, and second Bevel gear drives first bevel gear rotation, and first bevel gear drives reciprocating screw rotation, and reciprocating screw drives nut to far from pond Direction among body is mobile, and the nut of front and back drives push plate to, stepper motor rotation multi-turn mobile far from the direction among pond body Afterwards, sediment is released and is gone out from sewage draining exit by push plate after nut to top, and stepper motor continues to rotate, and drives nut to close to pond Direction among body is mobile, as shown in figure 4, stopping turning after the multi-turn of stepper motor rotation at this time after nut drives push plate to return to original position It is dynamic, keep the electromagnet of the first partition panel and the electromagnet of the second partition panel attracting, the electromagnet and third of the second partition panel separate The magnet of plate is attracting, and expansion plate is shunk, and electromagnet power-off, the top bevel of the first skewback is not contacted with third partition panel, and second tiltedly Block is mobile to the direction among pond body under the force of a spring, and the second skewback closes sewage draining exit, and the second skewback is logical The middle contact of incline plane on the bottom inclined-plane and the second skewback of crossing the first skewback moves up the first skewback.Then stepper motor inverts, Stepper motor drives half gear of front and back side, second gear to rotate clockwise, and second gear band carry-over bar moves down, rack gear band The rotating member in dynamic left side rotates clockwise, and the rotating member on the right side of rack drives rotates counterclockwise, and stops after stepper motor rotation half-turn Only, rotating member and expansion plate homing, half gear homing complete the process of primary complete cleaning sediment.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and what is described in the above embodiment and the description is only the present invention Principle, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these variation and Improvement is both fallen in the range of claimed invention.The present invention claims protection scope by appended claims and its Equivalent defines.

Claims (5)

1. a kind of Industrial Waste Water Treatments pond, it is characterised in that: including pond body (1), the upper end of the pond body (1) is equipped with water inlet pipe (2), it is symmetrically arranged with sewage draining exit (21) at left and right sides of pond body (1) bottom, the intermediate front and back of the pond body (1) is symmetrically set It is equipped with first sliding groove, is equipped with rack gear (15) up or down in the first sliding groove, the left and right sides of rack gear (15) upper end It is symmetrically arranged with rotating member (4), the rotating member (4) is rotationally located at the front and back end of the pond body (1), the rotating member (4) Side wall is equipped with the tooth engaged with the rack gear (15), and the side wall of the rotating member (4) is fixed with expansion plate (3), the pond body (1) front and back end, which is symmetrically arranged with, holds the expansion plate (3), the rotating member (4) movable loose slot (16), the pond body (1) Left and right sidewall in be symmetrically arranged with the open-and-close mechanism matched with the expansion plate (3), the open-and-close mechanism is for opening, closing It closes the sewage draining exit (21), the promotion being symmetrically arranged at left and right sides of the rack gear (15) below the rotating member (4) The inside of mechanism, the rear side of pond body (1) lower end is equipped with stepper motor (18), connects on the output shaft of the stepper motor (18) It is connected to the transmission mechanism being located in the pond body (1), the rack gear (15), the pushing mechanism connect with the transmission mechanism It connects.
2. a kind of Industrial Waste Water Treatments pond as described in claim 1, it is characterised in that: the transmission mechanism includes that front and back is symmetrical Ground is located at the tooth group of the inside of the pond body (1) lower end, the connection two tooth groups of front and back and is connected to the stepper motor (18) Output shaft on connecting shaft (22), the tooth group includes half gear (12), the second tooth that are connected on the connecting shaft (22) It takes turns (13), the second gear (13) is meshed with the rack gear (15), and the right end of half gear (12) is equipped with and described half The first gear (11) that gear (12) matches is coaxially connected with turbine (10) on the first gear (11).
3. a kind of Industrial Waste Water Treatments pond as claimed in claim 2, it is characterised in that: the pushing mechanism includes and the pond The push plate (17) of front-rear side walls contact in body (1), the front-rear side walls in the pond body (1) are equipped with the second groove, described to push away The front and back end of plate (17) is symmetrically fixed with the nut (6) for moving left and right and not being located at rotationally in second groove, the spiral shell The center of female (6) is threaded with the reciprocating screw (5) being rotationally located in second groove, and the reciprocating screw (5) is leaned on The intermediate direction of the nearly pond body (1) is linked with first bevel gear (7), and the lower end of the first bevel gear (7) is engaged with second The center of bevel gear (8), the second bevel gear (8) is linked with worm screw (9), and the worm screw (9) is mutually nibbled with the turbine (10) It closes, the first bevel gear (7), the second bevel gear (8), the worm screw (9) are rotationally located in the pond body (1).
4. a kind of Industrial Waste Water Treatments pond a method according to any one of claims 1-3, it is characterised in that: the open-and-close mechanism includes setting Second sliding slot in the pond body (1) side wall and the first skewback (19) being located in the second sliding slot up or down, institute It states second sliding slot and is connected with the board slot being connected with the loose slot (16) towards the side of the pond body (1) center position, it is described The lower end of second sliding slot is connected with the third sliding slot being connected with the sewage draining exit (21), and the sewage draining exit (21) is close to the pond body (1) side at center is equipped with the 4th sliding slot, is movably equipped with the second skewback in the third sliding slot, the 4th sliding slot (20), spring is equipped between second skewback (20) and the third sliding slot, the upper and lower side of first skewback (19) is distinguished Equipped with top bevel, bottom inclined-plane, the centre of second skewback (19) is equipped with the middle inclined-plane matched with the bottom inclined-plane, and described the The top bevel of one skewback (19) is matched with the expansion plate (3).
5. a kind of Industrial Waste Water Treatments pond as claimed in claim 4, it is characterised in that: the expansion plate (3) includes being fixed on The first partition panel on rotating member (4) side wall, first partition panel is interior to be equipped with the 5th sliding slot, slides in the 5th sliding slot Equipped with the second partition panel, it is equipped with the 6th sliding slot in second partition panel, is equipped in the 6th sliding slot with described first tiltedly The third partition panel that the top bevel of block (19) matches, the 5th sliding slot, the 6th sliding slot bottom be equipped with electromagnet, The end of the third partition panel is equipped with magnet.
CN201910050638.9A 2019-01-20 2019-01-20 A kind of Industrial Waste Water Treatments pond Withdrawn CN109647011A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910050638.9A CN109647011A (en) 2019-01-20 2019-01-20 A kind of Industrial Waste Water Treatments pond

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910050638.9A CN109647011A (en) 2019-01-20 2019-01-20 A kind of Industrial Waste Water Treatments pond

Publications (1)

Publication Number Publication Date
CN109647011A true CN109647011A (en) 2019-04-19

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CN201910050638.9A Withdrawn CN109647011A (en) 2019-01-20 2019-01-20 A kind of Industrial Waste Water Treatments pond

Country Status (1)

Country Link
CN (1) CN109647011A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113334270A (en) * 2021-05-24 2021-09-03 张天娇 Hydraulic tool fixing and adjusting device capable of achieving self-centering

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19954437A1 (en) * 1999-11-11 2001-05-17 Inowa Abwassertechnologie Gmbh Waste water treatment plant incorporates sludge settlement stages, oil separator, biological treatment and storage, being of prefabricated, partitioned construction
KR20100107741A (en) * 2009-03-26 2010-10-06 현대제철 주식회사 Water storage apparatus of facilities for cleaning of blast furnace gas
US9067727B2 (en) * 2011-11-10 2015-06-30 Roberts Marketing De, Inc. Apparatus and method for removing materials from a material collection container
CN205649897U (en) * 2016-05-31 2016-10-19 上海天颢实业有限公司 Mud setting sump
CN206121246U (en) * 2016-07-01 2017-04-26 方德高 Silt removing apparatus for waste water treatment
CN107890940A (en) * 2017-08-25 2018-04-10 贾君祥 A kind of sewage purification treater
CN207627997U (en) * 2017-11-26 2018-07-20 浙江安和环保科技有限公司 A kind of biochemical sludge sedimentation basin
CN108408854A (en) * 2018-04-04 2018-08-17 宁波蒙曼生物科技有限公司 A kind of environment protection sewage processing unit
CN207986931U (en) * 2018-01-21 2018-10-19 天津恒泰裕丰科技有限公司 A kind of water treatment facilities easy to use
CN109126218A (en) * 2018-09-18 2019-01-04 中南林业科技大学 Detention tank

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19954437A1 (en) * 1999-11-11 2001-05-17 Inowa Abwassertechnologie Gmbh Waste water treatment plant incorporates sludge settlement stages, oil separator, biological treatment and storage, being of prefabricated, partitioned construction
KR20100107741A (en) * 2009-03-26 2010-10-06 현대제철 주식회사 Water storage apparatus of facilities for cleaning of blast furnace gas
US9067727B2 (en) * 2011-11-10 2015-06-30 Roberts Marketing De, Inc. Apparatus and method for removing materials from a material collection container
CN205649897U (en) * 2016-05-31 2016-10-19 上海天颢实业有限公司 Mud setting sump
CN206121246U (en) * 2016-07-01 2017-04-26 方德高 Silt removing apparatus for waste water treatment
CN107890940A (en) * 2017-08-25 2018-04-10 贾君祥 A kind of sewage purification treater
CN207627997U (en) * 2017-11-26 2018-07-20 浙江安和环保科技有限公司 A kind of biochemical sludge sedimentation basin
CN207986931U (en) * 2018-01-21 2018-10-19 天津恒泰裕丰科技有限公司 A kind of water treatment facilities easy to use
CN108408854A (en) * 2018-04-04 2018-08-17 宁波蒙曼生物科技有限公司 A kind of environment protection sewage processing unit
CN109126218A (en) * 2018-09-18 2019-01-04 中南林业科技大学 Detention tank

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113334270A (en) * 2021-05-24 2021-09-03 张天娇 Hydraulic tool fixing and adjusting device capable of achieving self-centering

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Application publication date: 20190419