CN108798576B - Highway road surface detects with core machine of holing - Google Patents
Highway road surface detects with core machine of holing Download PDFInfo
- Publication number
- CN108798576B CN108798576B CN201810805225.2A CN201810805225A CN108798576B CN 108798576 B CN108798576 B CN 108798576B CN 201810805225 A CN201810805225 A CN 201810805225A CN 108798576 B CN108798576 B CN 108798576B
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- Prior art keywords
- side plate
- fixed
- base
- curb plate
- movable frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000005553 drilling Methods 0.000 claims abstract description 36
- 230000000007 visual effect Effects 0.000 claims abstract description 14
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 13
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 13
- 241001330002 Bambuseae Species 0.000 claims abstract description 13
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 13
- 239000011425 bamboo Substances 0.000 claims abstract description 13
- 229920000742 Cotton Polymers 0.000 claims description 10
- 229910001111 Fine metal Inorganic materials 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 239000005341 toughened glass Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 10
- 230000009467 reduction Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Road Repair (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a drilling core extractor for highway pavement detection, which comprises a movable frame and a base, wherein the top of the base is respectively connected and fixed with a bracket, a handle and an upright post from left to right, and the movable frame and the upright post form an up-down sliding structure through a fixed frame and a screw rod fixedly connected with the bottom of the handle. The beneficial effects of the invention are as follows: this highway road surface detects with drilling core machine is through adopting the structure of first curb plate, second curb plate and rubber baffle, can form the protective screen to boring a section of thick bamboo outer lane, blocks the noise that bores a section of thick bamboo during operation and produce to reach noise hazard reduction's effect, and this second curb plate can be convenient rotation open, can not influence constructor's work efficiency, and through the design of visual window, the staff can observe boring a section of thick bamboo outside first curb plate and second curb plate, and is more convenient.
Description
Technical Field
The invention relates to the technical field of highway pavement detection, in particular to a drilling core extractor for highway pavement detection.
Background
The highway is a modern term, is a public road capable of running automobiles, and various vehicles such as automobiles, bicycles, rickshaw, horses and the like and pedestrians can all walk, and the early highway is not limited, is mostly a simple highway, and has different limits on different roads later; as traffic is increasingly developed, roads used in a limited way are more and more, and particularly, some roads are specially used for automobiles, and expressways are developed, so that the type of the expressways is specially used for the whole-course closed use of the automobiles; the highway structure can be divided into a base layer and a surface layer according to rough division, and the base layer and the surface layer are required to be subjected to pumping sampling detection after construction is finished, whether the highway structure is qualified or not is checked, and the highway pavement detection needs to be subjected to drilling coring by a machine.
In the coring process, the existing drilling coring machine for highway pavement detection can generate great noise due to severe friction between the drilling barrel and pavement concrete, and the existing equipment lacks protection in the aspect and works for a long time, so that damage can be caused to the body of construction personnel on site.
Disclosure of Invention
The invention aims to provide a drilling core machine for highway pavement detection, which aims to solve the problem that the existing drilling core machine for highway pavement detection provided in the background art lacks the performance of noise protection, so that the body of on-site constructors is damaged under the condition of long-term working.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a highway road surface detects with drilling core machine, includes adjustable shelf and base, the top of base is connected respectively from a left side to the right side and is fixed with support, handle and stand, and the both sides rotation of base are connected with the gyro wheel, the adjustable shelf passes through mount and changes bottom fixed connection's screw rod and stand and constitutes sliding structure from top to bottom, and the left side of adjustable shelf is fixed with the engine through the bedplate installation, and the right side installation of adjustable shelf is fixed with the reducing gear box, and the top and the bottom of reducing gear box are connected with cooling water conveyer pipe and a brill section of thick bamboo respectively, root stand and supplementary pole setting form triangle-shaped with the outer lane of brill section of thick bamboo and distribute, and the structure phase-match of this triangle-shaped distribution mode and base corresponding position and adjustable shelf, the upper and lower both sides symmetric distribution of stand and supplementary pole setting triangle-shaped distribution range has first curb plate and second curb plate, and first curb plate constitute fixed knot constructs through bolted connection with the base, and the right side of second curb plate passes through hinge and first curb plate and is fixed with the fixed stand, the centre of first curb plate and second curb plate is fixed through the fixing bolt, but first curb plate and second curb plate are all fixed through the inside rubber window, and inside the inside is fixed with the rubber window.
Preferably, the first side plate and the second side plate are both of a double-layer structure, and the inner side surfaces of the first side plate and the second side plate are uniformly distributed with groove structures.
Preferably, the visual window is made of toughened glass, is of a double-layer vacuum structure, and corresponds to the drilling barrel in position.
Preferably, the head of the fixing bolt is of a Y-shaped structure.
Preferably, the upper side and the lower side of the rubber baffle are respectively fixedly connected to the movable frame and the base through screws, the rubber baffle is of a wave-shaped folding structure, and the area of the fine metal net is equal to that of the rubber baffle.
Preferably, the soundproof cotton adopts the polyester fiber material, and the soundproof cotton is embedded to be fixed in the inside of first curb plate and second curb plate bilayer structure.
Compared with the prior art, the invention has the beneficial effects that: this highway road surface detects with drilling core machine is through adopting the structure of first curb plate, second curb plate and rubber baffle, can form the protective screen to boring a section of thick bamboo outer lane, blocks the noise that bores a section of thick bamboo during operation and produce to reach noise hazard reduction's effect, and this second curb plate can be convenient rotation open, can not influence constructor's work efficiency, and through the design of visual window, the staff can observe boring a section of thick bamboo outside first curb plate and second curb plate, and is more convenient.
Drawings
FIG. 1 is a schematic side view of a core drilling machine for highway pavement detection according to the present invention;
FIG. 2 is a schematic top view of a column, an auxiliary pole, a movable frame, a base, a first side plate, a second side plate and a rubber baffle of the drilling coring machine for highway pavement detection;
FIG. 3 is an enlarged schematic view of the core drilling machine for road surface inspection of the present invention at A in FIG. 2;
FIG. 4 is a schematic side view of the movable frame, the rubber baffle and the base of the core drilling machine for highway pavement detection;
FIG. 5 is an enlarged schematic view of the core drilling machine for road surface inspection of the present invention at B in FIG. 4;
FIG. 6 is a schematic diagram of the left-hand structure of the movable frame, the rubber baffle and the base of FIG. 4 of the core drilling machine for highway pavement detection according to the present invention;
fig. 7 is a schematic diagram showing the front structure of the inner side surface of the second side plate of the core drilling machine for highway pavement detection according to the present invention.
In the figure: 1. cooling water conveying pipe, 2, auxiliary vertical rod, 3, reduction gearbox, 4, hinge, 5, movable frame, 6, drilling cylinder, 7, first side plate, 8, base, 9, engine, 10, handle, 11, support, 12, seat board, 13, gyro wheel, 14, fixing bolt, 15, fixed vertical frame, 16, second side plate, 17, visual window, 18, screw rod, 19, mount, 20, turning handle, 21, stand, 22, rubber baffle, 23, soundproof cotton, 24, fine metal mesh.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-7, the present invention provides a technical solution: the utility model provides a highway pavement detects and uses drilling core machine, including movable frame 5 and base 8, the top of base 8 is connected respectively from left to right fixedly has support 11, handle 10 and stand 21, and the both sides rotation of base 8 is connected with gyro wheel 13, movable frame 5 passes through the fixed frame 19 and the screw rod 18 of the fixed connection of revolving handle 20 bottom constitutes the vertical sliding structure with stand 21, the left side of movable frame 5 is installed fixedly with engine 9 through bedplate 12, the right side of movable frame 5 is installed fixedly with reducing gear box 3, and the top and the bottom of reducing gear box 3 are connected with cooling water conveyer pipe 1 and bore section of thick bamboo 6 respectively, 2 stands 21 and supplementary pole setting 2 form triangle-shaped distribution about the outer lane of bore section of thick bamboo 6, and this triangle-shaped distribution mode matches with the structure of base 8 corresponding position and the structure of movable frame 5, this structure can assist the upper and lower slip of movable frame 5, through the three-point support, the operation of the movable frame 5 is more stable, the upper side and the lower side of the triangular distribution range of the upright post 21 and the auxiliary upright post 2 are symmetrically provided with a first side plate 7 and a second side plate 16, the first side plate 7 and the base 8 form a fixed structure, the right side of the second side plate 16 forms a rotating structure through the hinge 4 and the first side plate 7, and the left side of the second side plate 16 is connected and fixed with the fixed upright frame 15 through the fixed bolt 14, the structure can form a barrier on the two sides of the outer ring of the drilling barrel 6, thereby blocking noise generated in the operation process of the drilling barrel 6, effectively reducing noise hazard, the rotating structure can facilitate the opening of the second side plate 16 by staff without increasing the workload of the constructors, the first side plate 7 and the second side plate 16 are of double-layer structures, the inner side surfaces of the first side plate 7 and the second side plate 16 are uniformly distributed with groove structures, the structure can further improve the sound absorption performance of the first side plate 7 and the second side plate 16, the noise is absorbed by the groove structure, the rebound times of the noise is increased, the noise energy is consumed, the noise reduction effect is achieved, thereby reducing the noise hazard, the head of the fixing bolt 14 is of a Y-shaped structure, the structure can increase the force area of the hands of a worker, the worker can operate the fixing bolt 14 without tools and freehand, the use is more convenient, the middle of the first side plate 7 and the second side plate 16 is glued and fixed with a visual window 17 in an embedding way, the inside of the first side plate 7 and the inside of the second side plate 16 are fixed with soundproof cotton 23, the structure of the visual window 17 is realized, the worker can observe the condition inside the first side plate 7 and the second side plate 16, the soundproof cotton 23 can further improve the soundproof effect of the first side plate 7 and the second side plate 16, the visual window 17 is made of toughened glass, the visual window 17 is of a double-layer vacuum structure, the position of the visual window 17 corresponds to the position of the drilling cylinder 6, the structure not only enables the visual window 17 to have higher strength and not to be damaged, but also enables the double-layer vacuum structure to block sound transmission, thereby improving the noise reduction effect of the device, the soundproof cotton 23 is made of polyester fiber, the soundproof cotton 23 is internally embedded and fixed in the inside of the double-layer structure of the first side plate 7 and the second side plate 16, the material has excellent soundproof effect, and can jointly act with the first side plate 7 and the second side plate 16, so that the soundproof effect of the device is better, thereby reducing noise hazard, the rubber baffle 22 is arranged between the left bottom of the movable frame 5 and the base 8, the fine metal net 24 is internally embedded and fixed in the rubber baffle 22, this structure can form a barrier from the left surface of boring section of thick bamboo 6, block the noise, and this thin metal mesh 24 can improve the intensity of rubber baffle 22, make rubber baffle 22 more durable, the upper and lower both sides of rubber baffle 22 are respectively through screw fixed connection in adjustable shelf 5 and base 8, and rubber baffle 22 is wave form beta structure, and the area of thin metal mesh 24 equals with the area of rubber baffle 22, this structure makes rubber baffle 22 can follow the upper and lower activity of adjustable shelf 5 and fold or extend, thereby can remain the shielding to boring section of thick bamboo 6 all the time.
The working principle of the embodiment is as follows: the drilling and coring machine for highway pavement detection firstly holds a handle 10 to push the device to a detection point, fixes a base 8 and the ground through bolts, then starts an engine 9, drives a reduction gearbox 3 by the engine 9, drives a drilling barrel 6 to rotate at high speed, enables a movable frame 5 to move downwards by a worker through clockwise rotation of a rotating handle 20, enables the drilling barrel 6 to gradually penetrate into the concrete of the highway pavement to drill and core, generates great noise in the process, forms triangular distribution of 2 upright posts 21 and auxiliary upright posts 2 relative to the outer ring of the drilling barrel 6, and symmetrically distributes a first side plate 7 and a second side plate 16 on the upper side and the lower side of the triangular distribution range of the upright posts 21 and the auxiliary upright posts 2, and installs a rubber baffle 22 between the left side bottom of the movable frame 5 and the base 8, the first side plate 7, the second side plate 16 and the rubber baffle 22 form a triangular barrier to the outer ring of the drilling barrel 6, in the working process of the drilling barrel 6, the noise is effectively prevented from being transmitted, the noise energy is weakened, the effect of reducing noise harm is achieved, the protection effect is achieved on the physical health of constructors, then the constructors can observe the running condition of the drilling barrel 6 through the visual window 17, after the drilling is finished, the Y-shaped structure of the head of the fixing bolt 14 is grasped, the fixing bolt is rotated and unscrewed, the second side plate 16 can be directly rotated to the outer side of the drilling barrel 6, the second side plate 16 is opened, the rotating handle 20 is rotated anticlockwise, the drilling barrel 6 is removed from pavement concrete, the drilling barrel 6 is detached, the drilled concrete core can be taken out, and the next detection is carried out.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (2)
1. The utility model provides a highway road surface detects with drilling core machine, includes fly frame (5) and base (8), be connected respectively from a left side to the right side at the top of base (8) and be fixed with support (11), handle (10) and stand (21), and the both sides rotation of base (8) are connected with gyro wheel (13), fly frame (5) constitute sliding construction from top to bottom through mount (19) and screw rod (18) of changeing (20) bottom fixed connection and stand (21), and the left side of fly frame (5) is fixed with engine (9) through bedplate (12) installation, and the right side installation of fly frame (5) is fixed with reducing gear box (3), and the top and the bottom of reducing gear box (3) are connected with cooling water conveyer pipe (1) and bore section of thick bamboo (6) respectively, its characterized in that: the two stand columns (21) are arranged, the two stand columns (21) and the auxiliary vertical rods (2) form triangular distribution with respect to the outer ring of the drilling cylinder (6), the triangular distribution mode is matched with the structure of the corresponding position of the base (8) and the structure of the movable frame (5), the upper side and the lower side of the triangular distribution range of the stand columns (21) and the auxiliary vertical rods (2) are symmetrically provided with a first side plate (7) and a second side plate (16), the first side plate (7) is connected with the base (8) through bolts to form a fixed structure, the right side of the second side plate (16) is connected with the first side plate (7) through a hinge (4), the left side of the second side plate (16) is connected with the fixed vertical frame (15) through a fixed bolt (14), the middle parts of the first side plate (7) and the second side plate (16) are respectively fixed with a visible window (17) through embedding, the interiors of the first side plate (7) and the second side plate (16) are respectively fixed with soundproof cotton (23), the left side bottom of the movable frame (5) and the base (8) are connected with rubber (22), and the inner side of the baffle (22) is fixed with a fine metal net (24);
the first side plate (7) and the second side plate (16) are of double-layer structures, and groove structures are uniformly distributed on the inner side surfaces of the first side plate (7) and the second side plate (16);
the visual window (17) is made of toughened glass, the visual window (17) is of a double-layer vacuum structure, and the position of the visual window (17) corresponds to the position of the drill cylinder (6);
the upper side and the lower side of the rubber baffle (22) are respectively and fixedly connected with the movable frame (5) and the base (8) through screws, the rubber baffle (22) is of a wave-shaped folding structure, and the area of the fine metal net (24) is equal to that of the rubber baffle (22); the soundproof cotton (23) is made of polyester fiber, and the soundproof cotton (23) is embedded and fixed in the inside of the double-layer structure of the first side plate (7) and the second side plate (16).
2. A highway pavement inspection coring machine as set forth in claim 1 wherein: the head of the fixing bolt (14) is of a Y-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810805225.2A CN108798576B (en) | 2018-07-20 | 2018-07-20 | Highway road surface detects with core machine of holing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810805225.2A CN108798576B (en) | 2018-07-20 | 2018-07-20 | Highway road surface detects with core machine of holing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108798576A CN108798576A (en) | 2018-11-13 |
| CN108798576B true CN108798576B (en) | 2023-11-10 |
Family
ID=64077186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810805225.2A Active CN108798576B (en) | 2018-07-20 | 2018-07-20 | Highway road surface detects with core machine of holing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108798576B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK597088D0 (en) * | 1987-10-27 | 1988-10-27 | Geissler & Kuper Gmbh | CLUTCH NAMELY TO A DIAMOND DRILL CHRONICLE WITH SCRAP THREATS AND CIRCULAR WIND CONNECTION |
| CN1098162A (en) * | 1993-06-01 | 1995-02-01 | 株式会社建调神户 | Underground border with down hammer |
| JPH10119030A (en) * | 1996-10-23 | 1998-05-12 | Consec:Kk | Core drill |
| JPH10166351A (en) * | 1996-12-06 | 1998-06-23 | Hitachi Koki Co Ltd | Apparatus for removing cut powder of core drill |
| JPH1134040A (en) * | 1997-07-16 | 1999-02-09 | Consec:Kk | Dust collection pad for dry type core drill |
| WO2002094527A1 (en) * | 2001-05-21 | 2002-11-28 | Mitsubishi Materials Corporation | Boring device and boring method |
| JP2007199059A (en) * | 2005-12-28 | 2007-08-09 | Naigai Engineering Co Ltd | Tube degradation core sampler and sample coring method |
| JP2009148981A (en) * | 2007-12-20 | 2009-07-09 | Edo Miyagi | Base attachment structure for core drill apparatus |
| JP2009191492A (en) * | 2008-02-13 | 2009-08-27 | Hirano Sangyo Kk | Road surface drilling equipment and road surface drilling method |
| CN202745777U (en) * | 2012-08-30 | 2013-02-20 | 刘力强 | Small electric geological core drilling machine |
| KR200478234Y1 (en) * | 2015-02-27 | 2015-09-10 | 박재문 | Core drill apparatus mounted excavator |
| FR3036130A1 (en) * | 2015-05-13 | 2016-11-18 | Maxart | DEVICE FOR TAKING A DRILLING ROD |
| CN107367400A (en) * | 2017-07-06 | 2017-11-21 | 中建路桥集团有限公司 | Boring and coring device for road engineering quality inspection |
| CN208619074U (en) * | 2018-07-20 | 2019-03-19 | 广东鸿翔工程检测咨询有限公司 | A kind of road surface detection core-drilling machine |
-
2018
- 2018-07-20 CN CN201810805225.2A patent/CN108798576B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK597088D0 (en) * | 1987-10-27 | 1988-10-27 | Geissler & Kuper Gmbh | CLUTCH NAMELY TO A DIAMOND DRILL CHRONICLE WITH SCRAP THREATS AND CIRCULAR WIND CONNECTION |
| CN1098162A (en) * | 1993-06-01 | 1995-02-01 | 株式会社建调神户 | Underground border with down hammer |
| JPH10119030A (en) * | 1996-10-23 | 1998-05-12 | Consec:Kk | Core drill |
| JPH10166351A (en) * | 1996-12-06 | 1998-06-23 | Hitachi Koki Co Ltd | Apparatus for removing cut powder of core drill |
| JPH1134040A (en) * | 1997-07-16 | 1999-02-09 | Consec:Kk | Dust collection pad for dry type core drill |
| WO2002094527A1 (en) * | 2001-05-21 | 2002-11-28 | Mitsubishi Materials Corporation | Boring device and boring method |
| JP2007199059A (en) * | 2005-12-28 | 2007-08-09 | Naigai Engineering Co Ltd | Tube degradation core sampler and sample coring method |
| JP2009148981A (en) * | 2007-12-20 | 2009-07-09 | Edo Miyagi | Base attachment structure for core drill apparatus |
| JP2009191492A (en) * | 2008-02-13 | 2009-08-27 | Hirano Sangyo Kk | Road surface drilling equipment and road surface drilling method |
| CN202745777U (en) * | 2012-08-30 | 2013-02-20 | 刘力强 | Small electric geological core drilling machine |
| KR200478234Y1 (en) * | 2015-02-27 | 2015-09-10 | 박재문 | Core drill apparatus mounted excavator |
| FR3036130A1 (en) * | 2015-05-13 | 2016-11-18 | Maxart | DEVICE FOR TAKING A DRILLING ROD |
| CN107367400A (en) * | 2017-07-06 | 2017-11-21 | 中建路桥集团有限公司 | Boring and coring device for road engineering quality inspection |
| CN208619074U (en) * | 2018-07-20 | 2019-03-19 | 广东鸿翔工程检测咨询有限公司 | A kind of road surface detection core-drilling machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108798576A (en) | 2018-11-13 |
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