CN113001779A - Special equipment for drilling hole on stone wall and placing detonator - Google Patents
Special equipment for drilling hole on stone wall and placing detonator Download PDFInfo
- Publication number
- CN113001779A CN113001779A CN202110356010.9A CN202110356010A CN113001779A CN 113001779 A CN113001779 A CN 113001779A CN 202110356010 A CN202110356010 A CN 202110356010A CN 113001779 A CN113001779 A CN 113001779A
- Authority
- CN
- China
- Prior art keywords
- cavity
- box body
- wall
- detonator
- end wall
- 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- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
- F42B33/04—Fitting or extracting primers in or from fuzes or charges
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The invention relates to the technical field of drilling machine equipment, in particular to equipment special for drilling holes on a stone wall and placing detonators, which comprises a box body, wherein a lifting device is arranged on the end wall of one side of the box body, which is far away from the ground, and the lifting device is used for lifting the box body, so that the equipment can be driven to move to a certain height by utilizing the lifting device; the movement of the fixing device can be realized, so that the equipment is fixedly adsorbed on the surface of the stone wall, and the drilling is convenient; the movement of the drilling device can be utilized, so that the drilling on the surface of the stone wall can be realized; the detonator can be driven to move by utilizing the pushing device; the detonator drilling tool can realize the movement of the pushing mechanism, so that the detonator is pushed to move to enter a drill hole, the detonator is placed, the danger of work is reduced, and the safety of workers is guaranteed.
Description
Technical Field
The invention relates to the technical field of drilling machine equipment, in particular to equipment special for drilling a hole on a stone wall and placing a detonator.
Background
A drill is a general term for machines and apparatuses that leave a cylindrical hole or hole in an object by means of rotary cutting or rotary pressing using a tool harder and sharper than the object.
The current drilling machine equipment is more and more widely used in the present life, but the equipment that drills on the stone wall is less, when drilling on the stone wall and placing the detonator at present, all places through the manual work that drills, and is dangerous in the operation, therefore it is necessary to set up a equipment of drilling on the stone wall and placing the detonator in order to improve above-mentioned problem.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides equipment special for drilling a hole in a stone wall to place a detonator, which can overcome the defects in the prior art, thereby improving the practicability of the equipment.
The technical scheme adopted by the invention for solving the technical problem is as follows; the equipment special for drilling holes in stone walls and placing detonators comprises a box body, wherein a lifting device is arranged on the end wall of the box body, which is far away from the ground, and is used for lifting the box body;
the end wall of one side, close to the rock wall, of the box body is provided with a fixing device, and the fixing device is used for fixedly adsorbing the box body on the rock wall so as to facilitate drilling on the rock wall;
a cavity is arranged on the end wall of the box body between the fixing devices, a drilling device is arranged on the end wall of one side, away from the stone wall, of the cavity, and the drilling device is used for drilling holes in the stone wall so as to facilitate placement of detonators;
a pushing device is arranged in the box body and used for pushing the detonator to move;
and a placing device is arranged in the box body and used for placing the detonator into the drilled hole.
Preferably, the lifting device comprises propellers which are rotatably arranged on the end wall of one side, far away from the ground, of the box body, the propellers are in power connection with a lifting motor, the lifting motor is fixedly installed in the box body, and a lifting shaft is fixedly installed on the end wall of one side, far away from the lifting motor, of the propeller.
Preferably, the fixing device comprises a lead screw which is arranged on the end wall of one side of the rock wall close to the box body in a rotating mode in an array mode, the lead screw is far away from the tail end of one side of the box body and is fixedly provided with an adsorption fixing block, the adsorption fixing block is connected with a fixing plate through a spring switch, the fixing plate is fixedly arranged on the outer surface of the lead screw, an air pump is fixedly arranged in the fixing plate and is fixedly connected with an air exhaust pipe, and the air exhaust pipe is far away from the tail end of one side of the fixing plate and is fixedly connected with the.
As preferred, drilling equipment includes it is provided with the drill bit lead screw to rotate on keeping away from rock wall one side end wall to rotate the cavity, be provided with the gear chamber in the box, the gear chamber is close to it is provided with the nut piece to rotate on the wall of cavity one side end, the nut piece with threaded connection between the drill bit lead screw, the meshing between nut piece and the gear, gear fixed mounting is at the surface of drive shaft, the drive shaft rotates the setting and is in between the end wall in gear chamber, power is connected between gear chamber and the motor, motor fixed mounting is in the gear chamber is kept away from on the wall of cavity one side end, run through in the conveyer pipe and be provided with the conveyer pipe, in the cavity the terminal fixed mounting in one side of drill bit lead screw has the drill.
Preferably, the pushing device comprises a hydraulic rod arranged in the box body in a sliding mode, the hydraulic rod is connected with a hydraulic pump in a sliding mode, the hydraulic pump is fixedly installed in the box body, the hydraulic rod pushes the detonators to enter the conveying pipe, the detonator array is placed in the detonator cavity, the detonator cavity is fixedly arranged in the box body, a push plate is arranged between the end walls of the detonator cavity in a sliding mode and used for pushing the detonators to move, the push plate is far away from one end wall of the detonators and fixedly connected with a pushing spring, and the pushing spring is far away from the tail end of one side of the push plate and the detonator cavity and fixedly connected between the end walls of one side of the hydraulic.
Preferably, the placing device comprises a closing mechanism and a pushing mechanism.
Preferably, the closing mechanism includes the closed chamber that sets up in the box, it is provided with sealed piece to slide in the closed chamber, sealed piece with the closed chamber is kept away from connect through sealing spring between the end wall of drill bit lead screw one side, sealed piece is close to be provided with the seal groove on the end wall of drill bit lead screw one side, fixed mounting has the sealing washer on the end wall of drill bit lead screw one side is kept away from to sealed piece fixedly connected with cotton rope on the end wall of drill bit lead screw one side, the cotton rope is kept away from fixed connection between sealed piece one side end and the cotton rope groove, fixed symmetry sets up the surface at the line wheel, line wheel fixed mounting is in the surface of drive shaft.
Preferably, the pushing mechanism comprises an inflation tube fixedly arranged in the sealing block, and the inflation tube is fixedly connected with the air pump.
The lifting device has the beneficial effects that the lifting device can be used for moving, so that the equipment is driven to move to a certain height; the movement of the fixing device can be realized, so that the equipment is fixedly adsorbed on the surface of the stone wall, and the drilling is convenient; the movement of the drilling device can be utilized, so that the drilling on the surface of the stone wall can be realized; the detonator can be driven to move by utilizing the pushing device; the detonator drilling tool can realize the movement of the pushing mechanism, so that the detonator is pushed to move to enter a drill hole, the detonator is placed, the danger of work is reduced, and the safety of workers is guaranteed.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for placing detonators in a hole drilled in a stone wall according to the present invention;
FIG. 2 is a schematic view of the structure A-A in FIG. 1;
FIG. 3 is a schematic view of B-B in FIG. 1;
FIG. 4 is a schematic view of the structure of C-C in FIG. 1;
FIG. 5 is an enlarged view of D in FIG. 1;
FIG. 6 is a bearing diagram of the present invention;
FIG. 7 is an isometric view of the drill bit of FIG. 1;
FIG. 8 is an isometric view of the adsorption mounting block of FIG. 1;
26, a detonator, 11, a box body, 18, a cavity, 101, a lifting motor, 102, a lifting shaft, 103, a propeller, 201, a screw rod, 202, a fixing plate, 203, an adsorption fixing block, 204, a spring switch, 205, an air suction pipe, 206, an air suction pump, 301, a drill screw rod, 302, a conveying pipe, 303, a motor, 304, a drill bit, 305, a nut block, 306, a gear, 307, a driving shaft, 308, a gear cavity, 401, a hydraulic pump, 402, the device comprises a hydraulic rod 403, a detonator cavity 404, a push plate 405, a pushing spring 541, a closed cavity 542, a closed spring 543, a sealing ring 544, a sealing groove 545, a sealing block 546, a rope 547, a rope groove 548, a rope wheel 551, an air pump 552, an inflation tube 100, a lifting device 200, a fixing device 300, a drilling device 400, a pushing device 500, a placing device 540, a closing mechanism 550 and a pushing mechanism.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
1-8, the equipment specially used for placing the detonator in the hole drilled on the stone wall comprises a box body 11, wherein a lifting device 100 is arranged on the end wall of the box body 11, which is far away from the ground, and the lifting device 100 is used for lifting the box body 11;
the fixing device 200 is arranged on the end wall of one side, close to the rock wall, of the box body 11, and the fixing device 200 is used for fixing and adsorbing the box body 11 on the rock wall so as to facilitate drilling on the rock wall;
a cavity 18 is arranged on the end wall of the box body 11 between the fixing devices 200, a drilling device 300 is arranged on the end wall of the cavity 18 at the side far away from the stone wall, and the drilling device 300 is used for drilling holes in the stone wall so as to place detonators 26 conveniently;
a pushing device 400 is arranged in the box body 11, and the pushing device 400 is used for pushing the detonator 26 to move;
a placing device 500 is arranged in the box body 11, and the placing device 500 is used for placing the detonator 26 into a drill hole.
The lifting device 100 comprises propellers 103 which are rotatably arranged on the end wall of one side, far away from the ground, of the box body 11, the propellers 103 are in power connection with a lifting motor 101, the lifting motor 101 is fixedly installed in the box body 11, and a lifting shaft 102 is fixedly installed on the end wall of one side, far away from the lifting motor 101, of the propellers 103. Thereby activating the lifting motor 101 to rotate the propeller 103, thereby rotating the lifting shaft 102, thereby lifting the case 11.
Drilling equipment 300 includes cavity 18 is kept away from and is rotated on the rock wall one side end wall and be provided with drill bit lead screw 301, be provided with gear chamber 308 in the box 11, gear chamber 308 is close to rotate on the cavity 18 one side end wall and be provided with nut piece 305, nut piece 305 with threaded connection between the drill bit lead screw 301, mesh between nut piece 305 and the gear 306, gear 306 fixed mounting is at the surface of drive shaft 307, drive shaft 307 rotates the setting and is in between the end wall of gear chamber 308, power connection between gear chamber 308 and the motor 303, motor 303 fixed mounting be in gear chamber 308 is kept away from on the cavity 18 one side end wall, it is provided with conveyer pipe 302 to run through in the conveyer pipe 302, in the cavity 18 the terminal fixed mounting in one side of drill bit lead screw 301 has drill bit 304. When the adsorption fixing block 203 is tightly fixed on the rock wall, the motor 303 is started, so that the driving shaft 307 is driven to rotate, the gear 306 is meshed with the nut block 305, the nut block 305 is in threaded connection with the drill bit screw 301, the drill bit screw 301 is driven to rotate to move towards the rock wall, and the drill bit 304 is driven to move to drill the rock wall.
The pushing device 400 comprises a hydraulic rod 402 arranged in the box body 11 in a sliding manner, the hydraulic rod 402 is connected with a hydraulic pump 401 in a sliding manner, the hydraulic pump 401 is fixedly installed in the box body 11, the hydraulic rod 402 pushes the detonators 26 to enter the conveying pipe 302, the detonators 26 are placed in an array in a detonator cavity 403, the detonator cavity 403 is fixedly arranged in the box body 11, a push plate 404 is arranged between the end walls of the detonator cavity 403 in a sliding manner, the push plate 404 is used for pushing the detonators 26 to move, a pushing spring 405 is fixedly connected to one end wall of the push plate 404 far away from the detonators 26, and the end of one side of the pushing spring 405 far away from the push plate 404 is fixedly connected with the end wall of one side of the detonator cavity. The hydraulic pump 401 is started, so that the hydraulic rod 402 is driven to move, the detonator 26 is pushed into the conveying pipe 302, when the detonator 26 enters the conveying pipe 302, the hydraulic rod 402 is reset, and the push plate 404 is pushed to move due to the action of the push spring 405, so that the detonator 26 is pushed to move for position compensation.
The placement device 500 includes a closing mechanism 540 and a pushing mechanism 550.
The closing mechanism 540 comprises a closed cavity 541 arranged in the box 11, a sealing block 545 is arranged in the closed cavity 541 in a sliding manner, the sealing block 545 is connected with the end wall of the closed cavity 541 on the side far away from the drill lead screw 301 through a closing spring 542, a sealing groove 544 is arranged on the end wall of the sealing block 545 on the side close to the drill lead screw 301, a sealing ring 543 is fixedly mounted on the end wall of the sealing groove 544 on the side far away from the drill lead screw 301, a wire rope 546 is fixedly connected to the end wall of the sealing block 545 on the side far away from the drill lead screw 301, the end of the wire rope 546 on the side far away from the sealing block 545 is fixedly connected with a wire rope groove 547, the sealing ring 574 is fixedly and symmetrically arranged on the outer surface of the. When drilling is completed, the end of the drill screw 301, which is far away from the drill 304, moves into the sealing cavity 541, the driving shaft 307 rotates, so that the reel 548 rotates, the cord groove 547 moves, the cord 546 is loosened, and the sealing block 545 is pushed to move due to the action of the sealing spring 542, so that the sealing groove 544 seals the drill screw 301, and the sealing ring 543 wraps and seals the surface of the drill screw 301.
The pushing mechanism 550 includes an air tube 552 fixedly disposed inside the sealing block 545, and the air tube 552 is fixedly connected to the air pump 551. When drilling is completed, the end of the drill screw 301, which is far away from the drill 304, moves into the closed cavity 541, the driving shaft 307 rotates, so that the wire wheel 548 rotates, so that the wire groove 547 moves, so that the wire 546 is loosened, the sealing block 545 is pushed to move due to the action of the closing spring 542, so that the sealing groove 544 closes the drill screw 301, so that the sealing ring 543 wraps and closes the surface of the drill screw 301, the air pump 551 is started, so that the conveying pipe 302 is inflated through the inflating pipe 552, and the detonator 26 is pushed to enter the drilling through the conveying pipe 302.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the design concept of the present invention, and the technical contents of the present invention are all described in the claims.
Claims (8)
1. The utility model provides an equipment of detonator is placed in drilling on stone wall which characterized in that: the lifting device comprises a box body (11), wherein a lifting device (100) is arranged on the end wall of one side, far away from the ground, of the box body (11), and the lifting device (100) is used for lifting the box body (11);
the end wall of one side, close to the rock wall, of the box body (11) is provided with a fixing device (200), and the fixing device (200) is used for fixing and adsorbing the box body (11) on the rock wall so as to facilitate drilling on the rock wall;
a cavity (18) is arranged on the end wall of the box body (11) between the fixing devices (200), a drilling device (300) is arranged on the end wall of one side, away from the stone wall, of the cavity (18), and the drilling device (300) is used for drilling holes in the stone wall so as to place detonators (26);
a pushing device (400) is arranged in the box body (11), and the pushing device (400) is used for pushing the detonator (26) to move;
a placing device (500) is arranged in the box body (11), and the placing device (500) is used for placing the detonator (26) into a drilled hole.
2. The equipment special for drilling holes in stone walls for placing detonators is characterized in that the equipment comprises the following components in parts by weight: lifting device (100) include box (11) are kept away from on the wall of ground one side end screw propeller (103) that the array rotated the setting, power connection between screw propeller (103) and lifting motor (101), lifting motor (101) fixed mounting be in box (11), screw propeller (103) are kept away from fixed mounting lifting shaft (102) on the wall of lifting motor (101) one side end.
3. The equipment special for drilling holes in stone walls for placing detonators is characterized in that the equipment comprises the following components in parts by weight: fixing device (200) include box (11) are close to lead screw (201) that the array rotation set up on the wall of rock one side end, lead screw (201) are kept away from the terminal fixed mounting in box (11) one side has absorption fixed block (203), it is connected through spring switch (204) between fixed block (203) and fixed plate (202), fixed plate (202) fixed mounting be in the surface of lead screw (201), fixed mounting has aspiration pump (206) in fixed plate (202), fixed connection between aspiration pump (206) and aspiration tube (205), aspiration tube (205) are kept away from fixed plate (202) one side end with adsorb fixed connection between the fixed block (203).
4. The equipment special for drilling holes in stone walls for placing detonators is characterized in that the equipment comprises the following components in parts by weight: the drilling device (300) comprises a drill bit screw rod (301) rotatably arranged on the end wall of one side, far away from the rock wall, of the cavity (18), a gear cavity (308) is arranged in the box body (11), the gear cavity (308) is close to the end wall of one side, far away from the rock wall, of the cavity (18), a nut block (305) is rotatably arranged on the end wall of one side, the nut block (305) is in threaded connection with the drill bit screw rod (301), the nut block (305) is meshed with a gear (306), the gear (306) is fixedly arranged on the outer surface of a driving shaft (307), the driving shaft (307) is rotatably arranged between the end walls of the gear cavity (308), the gear cavity (308) is in power connection with a motor (303), the motor (303) is fixedly arranged on the end wall of one side, far away from the cavity (18), and a conveying pipe (302) penetrates through the conveying pipe (302), and a drill (304) is fixedly arranged at the tail end of one side of the drill screw rod (301) in the cavity (18).
5. The equipment special for drilling holes in stone walls for placing detonators is characterized in that the equipment comprises the following components in parts by weight: the pushing device (400) comprises a hydraulic rod (402) arranged in the box body (11) in a sliding way, the hydraulic rod (402) is connected with a hydraulic pump (401) in a sliding way, the hydraulic pump (401) is fixedly arranged in the box body (11), the hydraulic ram (402) pushes the primer (26) into the delivery tube (302), the detonator (26) array is placed in a detonator cavity (403), the detonator cavity (403) is fixedly arranged in the box body (11), a push plate (404) is arranged between the end walls of the detonator cavity (403) in a sliding manner, the push plate (404) is used for pushing the detonator (26) to move, a pushing spring (405) is fixedly connected on one end wall of the push plate (404) far away from the detonator (26), the end of the pushing spring (405) far away from the push plate (404) is fixedly connected with the end wall of the detonator cavity (403) far away from the hydraulic rod (402).
6. The equipment special for drilling holes in stone walls for placing detonators is characterized in that the equipment comprises the following components in parts by weight: the placement device (500) comprises a closing mechanism (540) and a pushing mechanism (550).
7. The equipment special for drilling holes in stone walls for placing detonators is characterized in that: the closing mechanism (540) comprises a closing cavity (541) arranged in the box body (11), a sealing block (545) is arranged in the closing cavity (541) in a sliding mode, the sealing block (545) and the closing cavity (541) are far away from the end wall of one side of the drill screw rod (301) and connected through a closing spring (542), a sealing groove (544) is arranged on the end wall of one side, close to the drill screw rod (301), of the sealing block (545), a sealing ring (543) is fixedly installed on the end wall of one side, far away from the drill screw rod (301), of the sealing block (545), a wire rope (546) is fixedly connected to the end wall of one side, far away from the sealing block (545), of the sealing block (545) and fixedly connected to a wire rope groove (547), and the wire rope (546) is fixedly and symmetrically arranged on the outer surface of the wire rope (548), the wire wheel (548) is fixedly arranged on the outer surface of the driving shaft (307).
8. The equipment special for drilling holes in stone walls for placing detonators is characterized in that the equipment comprises the following components in parts by weight: the pushing mechanism (550) comprises an inflation tube (552) fixedly arranged in the sealing block (545), and the inflation tube (552) is fixedly connected with an air pump (551).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110356010.9A CN113001779A (en) | 2021-04-01 | 2021-04-01 | Special equipment for drilling hole on stone wall and placing detonator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110356010.9A CN113001779A (en) | 2021-04-01 | 2021-04-01 | Special equipment for drilling hole on stone wall and placing detonator |
Publications (1)
Publication Number | Publication Date |
---|---|
CN113001779A true CN113001779A (en) | 2021-06-22 |
Family
ID=76387751
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202110356010.9A Withdrawn CN113001779A (en) | 2021-04-01 | 2021-04-01 | Special equipment for drilling hole on stone wall and placing detonator |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN113001779A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113790646A (en) * | 2021-11-05 | 2021-12-14 | 湖州新开元碎石有限公司 | Hole-by-hole blasting device for stone mining area |
-
2021
- 2021-04-01 CN CN202110356010.9A patent/CN113001779A/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113790646A (en) * | 2021-11-05 | 2021-12-14 | 湖州新开元碎石有限公司 | Hole-by-hole blasting device for stone mining area |
CN113790646B (en) * | 2021-11-05 | 2023-02-17 | 湖州新开元碎石有限公司 | Hole-by-hole blasting device for stone mining area |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN113001779A (en) | Special equipment for drilling hole on stone wall and placing detonator | |
CN112942041A (en) | Equipment special for adding binder to road surface cracks | |
CN201865575U (en) | Drilling rig for exploration of water and gas | |
CN215218095U (en) | Deep sampling device for oil exploration | |
CN210829354U (en) | Ventilation unit for coal mining | |
CN109256227A (en) | The device that fuel rod in fuel assembly is spaced apart and is held in place | |
CN110953352B (en) | Electric blind plate valve | |
CN112459759B (en) | Coal mine underground coal seam fracturing coal seam gas extraction device | |
CN213976134U (en) | Building dolomite mining is with transfer device convenient to unloading | |
CN114813238A (en) | Device for underground water environment monitoring and geological investigation | |
CN211448605U (en) | Electric control type water plugging and sealing device | |
CN111175843A (en) | Underground water source detection device | |
CN215333365U (en) | Mud pump installation pull rod piston assembly device | |
CN117605413B (en) | Oil well high-energy gas fracturing yield and injection increasing equipment and method | |
CN109103999A (en) | Electrical power transfer apparatus and application method | |
CN213659660U (en) | Wireless remote control device of crawler drill | |
CN214697762U (en) | Ultra-short radius drilling integrated device for casing windowing | |
CN109132027A (en) | A kind of adhesive tape cutting apparatus | |
CN219974560U (en) | Coal mine gas extraction device | |
CN220687237U (en) | Underwater down-the-hole drill with adjustable drilling angle | |
CN103693574B (en) | A kind of 90 rigs reequip the method for pneumatic puffer and pneumatic puffer thereof | |
CN220689928U (en) | Blasting drilling device convenient to adjust | |
CN220849595U (en) | Drill rod transferring device of drilling machine | |
CN210948491U (en) | Efficient and labor-saving building construction spiral drilling machine | |
CN116990032B (en) | On-line monitoring device for running state of internal combustion engine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
WW01 | Invention patent application withdrawn after publication | ||
WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210622 |