CN112893521A - Steel formwork laminating device for building engineering - Google Patents
Steel formwork laminating device for building engineering Download PDFInfo
- Publication number
- CN112893521A CN112893521A CN202110067254.5A CN202110067254A CN112893521A CN 112893521 A CN112893521 A CN 112893521A CN 202110067254 A CN202110067254 A CN 202110067254A CN 112893521 A CN112893521 A CN 112893521A
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- CN
- China
- Prior art keywords
- fixedly connected
- mounting
- laminating device
- clip
- steel formwork
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- 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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Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 30
- 239000010959 steel Substances 0.000 title claims abstract description 30
- 238000010030 laminating Methods 0.000 title claims description 18
- 238000009415 formwork Methods 0.000 title claims description 12
- 238000003780 insertion Methods 0.000 claims abstract description 8
- 230000037431 insertion Effects 0.000 claims abstract description 7
- 238000010276 construction Methods 0.000 claims description 9
- 210000001503 joint Anatomy 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 abstract description 14
- 238000009434 installation Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 6
- 238000005457 optimization Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000003032 molecular docking Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
Abstract
The invention relates to the technical field of industrial template covering equipment and discloses a steel template covering and pressing device for building engineering, wherein an installation opening is formed in the upper surface of an installation seat, a clip is inserted into the installation opening, a hinge is fixedly connected to the bottom surface of the clip, a traction rope is hinged to the bottom end of the hinge, an elastic rod is fixedly connected to the bottom surface of the clip, an insertion opening is formed in the upper surface of an elastic box, a roller is rotatably connected to the side surface of the elastic rod, a spring is fixedly connected to the lower surface of the elastic rod, the surface of the roller is rotatably connected to the inner part of a guide rail, the elastic box is fixedly connected to the upper surface of the installation plate, a rotating shaft is driven to rotate by a rotating handle, the rotating shaft drives the traction rope to be retracted, the clip is driven by the traction rope to press the surface of a release plate, and steel plates with different sizes are, the steel plate is prevented from shifting in the overlaying process.
Description
Technical Field
The invention relates to the technical field of industrial template pressing equipment, in particular to a steel template pressing device for building engineering.
Background
The press is the main equipment for compression molding and is divided into a frame structure and a column structure according to the form of a frame structure. The pressing machine is divided into an upper pressing type and a lower pressing type according to the position of the main pressing oil cylinder, the press for pressing the large plastic laminated board can adopt the lower pressing type press with the oil cylinder, and the upper pressing type press is usually adopted for pressing general plastic parts.
In the use process of the existing laminating machine, a steel plate is generally placed and then flattened or printed by a press roller, but under the condition that the sizes of the steel plates are different, the position of the steel plate is easy to shift, and the operation is easy to miss.
Disclosure of Invention
In order to achieve the purpose of tightly pressing the steel plates with different sizes and avoiding the situation of position deviation of the steel plates in the process of overlaying, the invention provides the following technical scheme: the steel template laminating device for the building engineering comprises a press assembly, wherein a fixing assembly is fixedly connected inside the press assembly, and a containing assembly is fixedly connected inside the fixing assembly;
the press assembly comprises a machine body, a press roller is movably connected inside the machine body, a placing plate is fixedly connected inside the machine body, a switch is fixedly connected to the surface of the machine body, an operating part is fixedly connected to the surface of the machine body, and an inserting hole is formed in the surface of the machine body;
the fixing assembly comprises an installation seat, an installation opening is formed in the upper surface of the installation seat, a clip is inserted into the installation opening, a hinge is fixedly connected to the bottom surface of the clip, a traction rope is hinged to the bottom end of the hinge, an elastic rod is fixedly connected to the bottom surface of the clip, the surface of the elastic rod is inserted into an insertion opening, the insertion opening is formed in the upper surface of an elastic box, a roller is rotatably connected to the side surface of the elastic rod, a spring is fixedly connected to the lower surface of the elastic rod, the surface of the roller is connected to the inside of a guide rail in a rolling manner, the elastic box is fixedly connected to the upper surface of the installation plate, a through hole is formed in the surface of the installation plate, and a bearing is fixedly connected to the;
the storage assembly comprises a rotating handle, the tail end of the rotating handle is inserted in the through hole, the through hole is arranged on the surface of the mounting disc, the surface of the rotating handle is inserted in the butt joint port, the butt joint port is arranged on the surface of the rotary disc, the surface of the rotary disc is fixedly connected with a tension spring, the tail end of the tension spring is fixedly connected with a connecting plate, the surface of the connecting plate is fixedly connected with a cross roller, the cross roller is inserted in the meshing groove, and the meshing groove is arranged in the surface of the rotating shaft.
As optimization, the top end of the traction rope is hinged to the bottom end of the hinge, and the bottom end of the traction rope is wound on the surface of the rotating shaft, so that the control capability of the integral device is enhanced to the maximum extent, and the practicability of the integral device is guaranteed.
As optimization, the hinges are distributed on the left side and the right side of the outer side of the lower surface of the clip, the elastic rods are distributed on the left side and the right side of the inner side of the lower surface of the clip, and the hinges and the elastic rods are distributed at equal intervals, so that the stability of each component is effectively enhanced, and the supporting force of the whole device is enhanced.
As optimization, the rollers are distributed at the lower ends of the surfaces of the left side and the right side of the elastic rod, and the rollers on the left side and the right side are distributed on the same horizontal line, so that the flexibility of the whole device is better enhanced, and the use feeling is improved.
As optimization, the through holes are formed in the left side and the right side of the surface of the mounting plate, the surface of the traction rope penetrates through the inside of the through holes, the using effect of the whole device is effectively enhanced, and the using convenience is improved.
As optimization, the through hole and the butt joint port are distributed on the same horizontal line, and the rotating handle is simultaneously inserted into the through hole and the butt joint port, so that the use of the whole device is better protected from being influenced, and the practicality of the operation of the whole device is enhanced.
As optimization, the mounting groove of installation carousel is seted up to the inboard surface of mounting disc, and the size of mounting groove and connecting plate equals, better reinforcing the equilibrium of whole device, the effectual use flexibility that has strengthened whole device.
As optimization, the meshing groove is in a convex shape and is arranged on the right side of the rotating shaft, so that the operability of the whole device is enhanced more powerfully, and the firmness and the stability in the use process are ensured.
As optimization, the tail end of the mounting disc on the left side is inserted into the inner ring inner wall of the bearing, the outer ring outer wall of the bearing is fixedly connected to the lower end of the left side surface of the inner wall of the mounting seat, the controllability of workers to the whole device is improved to the greatest extent, the experience feeling of the whole device is improved, and the difficulty of the workers in operating the seat is reduced.
The invention has the beneficial effects that: according to the steel formwork laminating device for the building engineering, the rotating shaft is driven to rotate through the rotating handle, the rotating shaft drives the traction rope to be folded and unfolded, and then the traction rope drives the clamp fastener to be pressed against the surface of the laminated plate, so that steel plates of different sizes are tightly pressed, and the steel plates are prevented from being subjected to position deviation in the laminating process; and oppress the spring through the elastic rod, the haulage rope pulling clip, friction resistance when rethread gyro wheel rolls in the inside of guide rail and reduces the elastic rod displacement to reach nimble control integrated device, strengthened the effect of integrated device's practicality.
Drawings
FIG. 1 is a front view of the overall appearance structure of the present invention;
FIG. 2 is a front view of the mounting structure of the present invention;
FIG. 3 is a front direct view of the cross roll configuration of the present invention;
FIG. 4 is a schematic view of the inside of the mount structure of the present invention viewed directly from the side;
FIG. 5 is an enlarged view of the structure at the position A in the soil according to the present invention;
FIG. 6 is a schematic view showing the inside of the engaging groove structure of the present invention viewed directly;
FIG. 7 is an enlarged view of the structure at B in FIG. 6 according to the present invention.
In the figure: 100-press component, 101-machine body, 102-press roll, 103-placing plate, 104-switch, 105-control component, 106-plug hole, 200-fixing component, 201-mounting seat, 202-mounting hole, 203-clip, 204-hinge, 205-pulling rope, 206-elastic rod, 207-insertion hole, 208-elastic box and 209-roller, 210-spring, 211-guide rail, 212-mounting plate, 213-through hole, 214-bearing, 300-receiving component, 301-rotating handle, 302-mounting plate, 303-through hole, 304-rotating disc, 305-pair of interfaces, 306-tension spring, 307-connecting plate, 308-cross roller, 309-rotating shaft and 310-engaging groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 7, a steel form plate laminating apparatus for construction engineering includes a press assembly 100, a fixing assembly 200 fixedly connected to the inside of the press assembly 100, and a receiving assembly 300 fixedly connected to the inside of the fixing assembly 200;
the press assembly 100 comprises a machine body 101, a press roller 102 is movably connected inside the machine body 101, a placing plate 103 is fixedly connected inside the machine body 101, a switch 104 is fixedly connected on the surface of the machine body 101, an operation control member 105 is fixedly connected on the surface of the machine body 101, and a plug hole 106 is formed in the surface of the machine body 101;
the fixing assembly 200 comprises a mounting seat 201, a mounting opening 202 is formed in the upper surface of the mounting seat 201, a clip 203 is inserted into the mounting opening 202, a hinge 204 is fixedly connected to the bottom surface of the clip 203, a traction rope 205 is hinged to the bottom end of the hinge 204, an elastic rod 206 is fixedly connected to the bottom surface of the clip 203, the surface of the elastic rod 206 is inserted into an insertion opening 207, the insertion opening 207 is formed in the upper surface of an elastic box 208, a roller 209 is rotatably connected to the side surface of the elastic rod 206, a spring 210 is fixedly connected to the lower surface of the elastic rod 206, the surface of the roller 209 is connected to the inside of a guide rail 211 in a rolling manner, the elastic box 208 is fixedly connected to the upper surface of the mounting plate 212, a through hole 213 is formed in the surface of the;
the containing assembly 300 comprises a rotating handle 301, the tail end of the rotating handle 301 is inserted into a through hole 303, the through hole 303 is arranged on the surface of the mounting plate 302, the surface of the rotating handle 301 is inserted into a butt joint port 305, the butt joint port 305 is arranged on the surface of the rotating plate 304, a tension spring 306 is fixedly connected to the surface of the rotating plate 304, a connecting plate 307 is fixedly connected to the tail end of the tension spring 306, a cross roller 308 is fixedly connected to the surface of the connecting plate 307, the cross roller 308 is inserted into an engaging groove 310, and the engaging groove 310 is arranged inside the surface of a rotating shaft 309.
Referring to fig. 2-5, the top end of the pull rope 205 is hinged to the bottom end of the hinge 204, and the bottom end of the pull rope 205 is wound around the surface of the rotating shaft 309.
Referring to fig. 2-4, the hinges 204 are disposed on the outer left and right sides of the lower surface of the clip 203, the elastic rods 206 are disposed on the inner left and right sides of the lower surface of the clip 203, and the hinges 204 and the elastic rods 206 are disposed at equal intervals.
Referring to fig. 4-5, the rollers 209 are disposed at the lower ends of the left and right surfaces of the elastic rod 206, and the rollers 209 disposed at the left and right sides are disposed on the same horizontal line.
Referring to fig. 4-5, the through holes 213 are opened on both left and right sides of the surface of the mounting plate 212, and the surface of the pulling rope 205 passes through the inside of the through holes 213.
Referring to fig. 6-7, the through hole 303 and the docking port 305 are distributed on the same horizontal line, and the rotation handle 301 is inserted into the through hole 303 and the docking port 305 at the same time.
Referring to fig. 6-7, the inner surface of the mounting plate 302 is provided with a mounting groove for mounting the turntable 304, and the size of the mounting groove is equal to the size of the connecting plate 307.
Referring to fig. 6, the engaging groove 310 is in a shape of a "convex", and the engaging groove 310 is opened at the right side of the rotating shaft 309.
Referring to fig. 4, the end of the left mounting plate 302 is inserted into the inner wall of the inner ring of the bearing 214, and the outer wall of the outer ring of the bearing 214 is fixedly connected to the lower end of the left surface of the inner wall of the mounting base 201.
The working principle is as follows: in use, referring to fig. 1-7, firstly, a worker is required to manually place a steel plate on the upper surface of the placement plate 103, then manually rotate the rotation handle 301 clockwise, drive the rotation shaft 309 to rotate by the rotation of the rotation handle 301, pull the pulling rope 205 to contract by the rotation of the rotation shaft 309 to drive the clip 203 to press downwards, when the clip 203 is pressed downwards, the elastic rod 206 is pulled to be replaced and pressed downwards in the elastic box 208, the elastic rod 206 compresses the spring 210 to limit the descending speed of the clip 203, meanwhile, the roller 209 rolls in the guide rail 211 to reduce the friction resistance when the elastic rod 206 is displaced, then the switch 104 is opened, the press roller 102 is used for pressing the steel plate on the placement plate 103, and a suction cup is inserted in the surface of the end of the rotation handle 301, after the operation is completed, the suction cup is pushed to be adsorbed on the surface of the mounting seat 201, thereby fix the whole device, after covering and pressing the completion, will rotate handle 301 and outwards stimulate by the staff is manual again, when rotating handle 301 atress when outwards displacing, drive connecting plate 307 compression extension spring 306, drive the end that the cross roller 308 breaks away from the meshing groove 310 with the help of connecting plate 307 simultaneously, thereby loosen axis of rotation 309, when axis of rotation 309 was loosened, spring 210 drove the elastic rod 206 and kick-backs upwards and resets, thereby the pulling haulage rope 205 resets, then drive the clip 203 and get back to the original place.
To sum up, the steel formwork laminating device for the building engineering drives the rotating shaft 309 to rotate through the rotating handle 301, the rotating shaft 309 drives the traction rope 205 to fold and unfold, and then the traction rope 205 drives the clamp 203 to press the surface of the opposite unfolding plate 103, so that steel plates with different sizes are tightly pressed, and the steel plates are prevented from being subjected to position offset in the laminating process; and oppress the spring 210 through the elastic rod 206, the haulage rope 205 stimulates the clip 203, and then roll in the inside of guide rail 211 through gyro wheel 209 and reduce the frictional resistance when the elastic rod 206 displacement to reach nimble control overall device, strengthened the effect of the practicality of overall device.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (9)
1. The utility model provides a steel template laminating device for building engineering, includes press assembly (100), its characterized in that: a fixing assembly (200) is fixedly connected to the inside of the press assembly (100), and a receiving assembly (300) is fixedly connected to the inside of the fixing assembly (200);
the press assembly (100) comprises a machine body (101), a press roller (102) is movably connected inside the machine body (101), a placing plate (103) is fixedly connected inside the machine body (101), a switch (104) is fixedly connected to the surface of the machine body (101), an operating control part (105) is fixedly connected to the surface of the machine body (101), and a plug hole (106) is formed in the surface of the machine body (101);
the fixing component (200) comprises a mounting seat (201), a mounting opening (202) is formed in the upper surface of the mounting seat (201), a clip (203) is inserted into the mounting opening (202), a hinge (204) is fixedly connected to the bottom surface of the clip (203), a traction rope (205) is hinged to the bottom end of the hinge (204), an elastic rod (206) is fixedly connected to the bottom surface of the clip (203), the surface of the elastic rod (206) is inserted into the insertion opening (207), the insertion opening (207) is formed in the upper surface of an elastic box (208), a roller (209) is rotatably connected to the side surface of the elastic rod (206), a spring (210) is fixedly connected to the lower surface of the elastic rod (206), the surface of the roller (209) is connected to the inside of a guide rail (211) in a rolling manner, and the elastic box (208) is fixedly connected to the upper surface of a mounting plate (212), a through hole (213) is formed in the surface of the mounting plate (212), and a bearing (214) is fixedly connected to the inner wall surface of the mounting seat (201);
accomodate subassembly (300) including rotating handle (301), the end of rotating handle (301) is pegged graft in the inside of through hole (303), the surface at mounting disc (302) is seted up in through hole (303), the surface of rotating handle (301) is pegged graft in the inside to interface (305), set up the surface at carousel (304) to interface (305), the fixed surface of carousel (304) is connected with extension spring (306), the terminal fixedly connected with connecting plate (307) of extension spring (306), the fixed surface of connecting plate (307) is connected with cross roller (308), cross roller (308) are pegged graft in the inside of meshing groove (310), meshing groove (310) are seted up in the inside surface of axis of rotation (309).
2. The steel formwork laminating device for construction engineering according to claim 1, characterized in that: the top end of the traction rope (205) is hinged at the bottom end of the hinge (204), and the bottom end of the traction rope (205) is wound on the surface of the rotating shaft (309).
3. The steel formwork laminating device for construction engineering according to claim 1, characterized in that: the hinges (204) are distributed on the left side and the right side of the outer side of the lower surface of the clamp (203), the elastic rods (206) are distributed on the left side and the right side of the inner side of the lower surface of the clamp (203), and the hinges (204) and the elastic rods (206) are distributed at equal intervals.
4. The steel formwork laminating device for construction engineering according to claim 1, characterized in that: the rollers (209) are distributed at the lower ends of the surfaces of the left side and the right side of the elastic rod (206), and the rollers (209) on the left side and the right side are distributed on the same horizontal line.
5. The steel formwork laminating device for construction engineering according to claim 1, characterized in that: the through holes (213) are formed on the left and right sides of the surface of the mounting plate (212), and the surface of the pulling rope (205) passes through the inside of the through holes (213).
6. The steel formwork laminating device for construction engineering according to claim 1, characterized in that: the through hole (303) and the butt joint port (305) are distributed on the same horizontal line, and the rotating handle (301) is simultaneously inserted into the through hole (303) and the butt joint port (305).
7. The steel formwork laminating device for construction engineering according to claim 1, characterized in that: the inner side surface of the mounting disc (302) is provided with a mounting groove for mounting the rotary disc (304), and the size of the mounting groove is equal to that of the connecting plate (307).
8. The steel formwork laminating device for construction engineering according to claim 1, characterized in that: the engaging groove (310) is in a convex shape, and the engaging groove (310) is arranged on the right side of the rotating shaft (309).
9. The steel formwork laminating device for construction engineering according to claim 1, characterized in that: the tail end of the mounting disc (302) on the left side is inserted into the inner wall of the inner ring of the bearing (214), and the outer wall of the outer ring of the bearing (214) is fixedly connected to the lower end of the left side surface of the inner wall of the mounting seat (201).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110067254.5A CN112893521A (en) | 2021-01-19 | 2021-01-19 | Steel formwork laminating device for building engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110067254.5A CN112893521A (en) | 2021-01-19 | 2021-01-19 | Steel formwork laminating device for building engineering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112893521A true CN112893521A (en) | 2021-06-04 |
Family
ID=76115289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110067254.5A Pending CN112893521A (en) | 2021-01-19 | 2021-01-19 | Steel formwork laminating device for building engineering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112893521A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005298154A (en) * | 2004-04-13 | 2005-10-27 | Tokiwa:Kk | Long item winding device |
| CN207244665U (en) * | 2017-07-12 | 2018-04-17 | 民勤县邦德贸易有限公司 | A kind of Safety well cover of the convenient water intaking in farmland |
| CN207464242U (en) * | 2017-12-02 | 2018-06-08 | 宁夏正元科创科技有限公司 | A kind of mechanical processing drilling device |
| CN207606544U (en) * | 2017-11-23 | 2018-07-13 | 深圳市金凤凰装饰工程有限公司 | A kind of construction decoration plate drilling device |
| CN209721245U (en) * | 2019-03-01 | 2019-12-03 | 江苏申源特种合金有限公司 | A kind of stainless steel welding stick storage device |
| CN210280538U (en) * | 2019-04-04 | 2020-04-10 | 新昌县大市聚镇伯凡机械厂 | Press machine convenient to fix and used for machining bearing |
| CN210359054U (en) * | 2019-08-16 | 2020-04-21 | 杭州萧山建一五金有限公司 | Effectual bearing forging equipment of bearing hole forging and pressing |
| CN211292122U (en) * | 2019-12-13 | 2020-08-18 | 吴李群 | Groundwater dynamic monitoring device |
| CN211764158U (en) * | 2019-12-11 | 2020-10-27 | 刘保红 | Automatic impression device of location |
-
2021
- 2021-01-19 CN CN202110067254.5A patent/CN112893521A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005298154A (en) * | 2004-04-13 | 2005-10-27 | Tokiwa:Kk | Long item winding device |
| CN207244665U (en) * | 2017-07-12 | 2018-04-17 | 民勤县邦德贸易有限公司 | A kind of Safety well cover of the convenient water intaking in farmland |
| CN207606544U (en) * | 2017-11-23 | 2018-07-13 | 深圳市金凤凰装饰工程有限公司 | A kind of construction decoration plate drilling device |
| CN207464242U (en) * | 2017-12-02 | 2018-06-08 | 宁夏正元科创科技有限公司 | A kind of mechanical processing drilling device |
| CN209721245U (en) * | 2019-03-01 | 2019-12-03 | 江苏申源特种合金有限公司 | A kind of stainless steel welding stick storage device |
| CN210280538U (en) * | 2019-04-04 | 2020-04-10 | 新昌县大市聚镇伯凡机械厂 | Press machine convenient to fix and used for machining bearing |
| CN210359054U (en) * | 2019-08-16 | 2020-04-21 | 杭州萧山建一五金有限公司 | Effectual bearing forging equipment of bearing hole forging and pressing |
| CN211764158U (en) * | 2019-12-11 | 2020-10-27 | 刘保红 | Automatic impression device of location |
| CN211292122U (en) * | 2019-12-13 | 2020-08-18 | 吴李群 | Groundwater dynamic monitoring device |
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Application publication date: 20210604 |
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