CN215330079U - Engineering is managed and is used foundation ditch displacement measurement device - Google Patents
Engineering is managed and is used foundation ditch displacement measurement device Download PDFInfo
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- CN215330079U CN215330079U CN202121169065.0U CN202121169065U CN215330079U CN 215330079 U CN215330079 U CN 215330079U CN 202121169065 U CN202121169065 U CN 202121169065U CN 215330079 U CN215330079 U CN 215330079U
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Abstract
The application relates to a foundation pit displacement measurement device for engineering supervision, and relates to the field of engineering construction detection equipment. It includes fixed plate, detector and the supporting component who supports the detector, the detector is located the fixed plate, the supporting component is located the fixed plate bottom, spacing hole has been seted up to the fixed plate bottom, still includes lifting rope and lead weight, spacing hole is passed to lifting rope one end and the detector bottom is connected, the lifting rope other end and lead weight fixed connection. The application can improve the accuracy of the placement position of the measuring device.
Description
Technical Field
The application relates to the field of engineering construction check out test set, especially relate to a foundation ditch displacement measurement device for engineering supervision.
Background
The foundation pit excavation can be related to usually among the building construction process, and the quality direct influence of foundation pit has the life of building, in order to improve the quality of foundation pit, needs carry out displacement detection to the foundation pit.
In the related art, the chinese utility model patent with the publication number of CN212109818U discloses a foundation pit displacement measuring device for construction engineering supervision, which comprises a fixed bottom plate, a first fixed column, a clamping sleeve, a first fixed screw, a universal adjusting wheel, a fixed column, a second fixed screw, a telescopic column, a rectangular housing, a fixed port, a horizontal ball, a second fixed column and a scale mark; the fixed bottom plate is horizontally welded and fixed to the bottom of the clamping sleeve, the first fixed columns are welded to four corners of the bottom of the fixed bottom plate, the clamping sleeve is welded and fixed to the center of the upper surface of the fixed bottom plate, the first fixed screws are screwed and locked on the side wall of the clamping sleeve, the universal adjusting wheels are fixed in the clamping sleeve through the first fixed screws, the fixed columns are welded and fixed to the universal adjusting wheels, the second fixed screws are screwed and locked on the side wall of the top end of the fixed columns, the telescopic columns are fixed in the inner cavities of the fixed columns through the second fixed screws, the rectangular shell is welded and fixed to the top ends of the telescopic columns, the fixed ports horizontally penetrate through the rectangular shell, the horizontal ball is arranged at the center of the top of the rectangular shell in an embedded mode, the second fixed columns are fixed at the center of the fixed ports, and the scale marks are arranged on the surfaces of the telescopic columns.
In view of the above related art, the inventor thinks that when the measuring device in the related art is used to measure the displacement of the foundation pit, an operator needs to place the measuring device at the same measuring point to measure for multiple times, which is convenient for comparison, but the measuring device in the related art is difficult to place at the same position as the previous time, and the accuracy of the placement position of the measuring device is low.
SUMMERY OF THE UTILITY MODEL
In order to improve the precision that measuring device placed the position, this application provides a foundation ditch displacement measurement device for engineering supervision.
The application provides a foundation ditch displacement measurement device for engineering supervision adopts following technical scheme:
the utility model provides a foundation ditch displacement measurement device for engineering supervision, includes fixed plate, detector and the supporting component who supports the detector, the detector is located the fixed plate, the supporting component is located the fixed plate bottom, the fixed plate bottom has been seted up spacingly, still includes lifting rope and lead weight, lifting rope one end is passed spacingly and is connected bottom the detector, the lifting rope other end and lead weight fixed connection.
Through adopting above-mentioned technical scheme, the detector is placed on the fixed plate, when needs detect the interval between certain two points in the foundation ditch, earlier carry out the sign near the foundation ditch to the point that needs the measurement, place the detector, lifting rope and plummet receive the vertical sign of self action of gravity, the vertical directional sign of plummet, detector and identification point coincide in vertical direction, make things convenient for the detector to measure the interval between the side sign of foundation ditch week, improve the precision that measuring device placed the position.
Optionally, the detector top is provided with the horizontal ball, the detector is provided with universal regulating wheel towards fixed plate one side, the fixed plate is provided with smooth chamber towards detector one side, universal regulating wheel and smooth chamber lateral wall rotate to be connected, the fixed plate lateral wall is provided with first fixed orifices, first fixed orifices department threaded connection has first dead lever, first dead lever lateral wall can support tightly with universal regulating wheel.
Through adopting above-mentioned technical scheme, conveniently detect the levelness of detector through the horizontal ball, operating personnel rotates the detector, universal regulating wheel is at smooth intracavity rotation, detector and fixed plate slide, accomplish the back when detector position control, operating personnel rotates first dead lever, first dead lever stretches into the one end and the universal regulating wheel of first fixed orifices and supports tightly, the detector position is fixed, makes things convenient for the detector to measure the displacement of foundation ditch identification point, improves measuring device and carries out measuring convenience to the foundation ditch.
Optionally, the support assembly includes a plurality of support rods, one end of each support rod is connected to the bottom of the fixing plate, and the support rods are symmetrically arranged around the center of the fixing plate.
Through adopting above-mentioned technical scheme, the fixed plate props up through a plurality of bracing pieces, makes things convenient for constructor to rotate the detector at fixed plate top, improves the detector and detects the different points on the foundation ditch, improves measuring device and carries out the convenience that detects to the foundation ditch displacement.
Optionally, one side of the supporting rod towards the fixing plate is fixedly connected with a threaded section, the threaded section extends into the fixing plate, and the supporting rod and the fixing plate are detachably connected through threads.
Through adopting above-mentioned technical scheme, bracing piece and fixed plate pass through the screw thread section and can dismantle the connection, during the removal measuring device, rotate the bracing piece earlier, screw thread section and fixed plate separation, bracing piece and fixed plate separation back, operating personnel carries bracing piece and fixed plate respectively, makes things convenient for measuring device to place on the foundation ditch, improves the convenience of removing measuring device.
Optionally, the supporting assembly further comprises a plurality of adjusting rods, the sliding grooves are formed in the ends, far away from the fixing plate, of the supporting rods, the adjusting rods are located at the sliding grooves, the adjusting rods are connected with the sliding groove side walls in a sliding mode, second fixing holes are formed in the sliding groove side walls, second fixing rods are arranged in the second fixing holes, and the second fixing rods can be tightly abutted to the adjusting rod side walls.
Through adopting above-mentioned technical scheme, measuring device is when measuring the foundation ditch, when there is debris to lead to the detector to be difficult to the perpendicular to foundation ditch surface support on the foundation ditch surface, operating personnel is to rotating the second dead lever, the second dead lever rotates along the second fixed orifices, the separation of second dead lever and regulation pole, it slides along the spout to adjust the pole, after the mark point of perpendicular to foundation ditch was placed to the detector, operating personnel rotated the second dead lever, the second dead lever supports tightly with the regulation pole, reduce the detector and place the skew possibility that leads to empting, improve the security that measuring device measured the foundation ditch displacement.
Optionally, a limiting groove is formed in the supporting rod, the limiting groove is located on one side, close to the fixed plate, of the sliding groove, a limiting block is arranged on one side, facing the limiting groove, of the adjusting rod, the limiting block is fixedly connected with the adjusting rod, and the limiting block is connected with the side wall of the limiting groove in a sliding mode.
Through adopting above-mentioned technical scheme, when adjusting the pole and sliding in the spout, stopper and spacing groove laminating back, adjust the pole and be restricted at the spacing inslot, reduce the possibility of adjusting pole and spout lateral wall separation, reduce the possibility of adjusting the pole loss, improve the convenience of adjusting the detector height, improve the convenience that measuring device measured the foundation ditch displacement.
Optionally, a supporting plate is arranged at one end, away from the supporting rod, of the adjusting rod, and the supporting plate is connected with the adjusting rod.
Through adopting above-mentioned technical scheme, the backup pad can improve the area of contact who adjusts pole and ground, takes place the possibility of empting when reducing the bracing piece support detector, reduces the detector and takes place the possibility of damaging, improves the stability that measuring device measured the foundation ditch displacement.
Optionally, the support plate is hinged to the adjustment rod.
Through adopting above-mentioned technical scheme, when the ground unevenness of foundation ditch, the backup pad is placed when ground, and the ground laminating of backup pad and foundation ditch reduces the regulation pole and supports the possibility that the detector takes place the slope, makes things convenient for detector perpendicular to ground to place, improves the convenience that measuring device detected the foundation ditch displacement.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the bottom of the detector is provided with the lifting rope and the lead weight, when the detector measures the displacement of the foundation pit, the lifting rope and the lead weight are directly vertical to the bottom surface, and the lead weight is superposed with the mark point measured on the ground of the foundation pit, so that the precision of the detector placed on the foundation pit is improved, the measurement device can conveniently measure the displacement of the foundation pit, and the precision of the placement position of the measurement device is improved;
2. a horizontal ball is placed on the detector, a measurer stirs the detector, the universal adjusting wheel slides in the sliding cavity, after the detector is horizontal, an operator rotates the first fixing rod, the first fixing rod is tightly abutted against the universal adjusting wheel, and the position of the universal adjusting wheel is fixed, so that the operator can conveniently measure the displacement data of the foundation pit by using the measuring device;
3. the bottom of the fixing plate is provided with the supporting rod and the adjusting rod, so that the horizontal state of the detector is conveniently adjusted, the possibility that the detector is obliquely placed is reduced, the stability of the measuring device for measuring the displacement data of the foundation pit is improved, and the convenience of the measuring device for measuring the displacement data of the foundation pit is improved.
Drawings
Fig. 1 is a schematic structural diagram of a foundation pit displacement measurement device for engineering supervision according to an embodiment of the present application.
Fig. 2 is a perspective cross-sectional view of a foundation pit displacement measuring device for engineering supervision according to an embodiment of the present application.
Fig. 3 is an enlarged view of a portion a in fig. 2.
Description of reference numerals: 1. a fixing plate; 101. a limiting hole; 102. a slide chamber; 103. a first fixing hole; 104. a threaded hole; 2. a detector; 3. a support assembly; 31. a support bar; 311. a threaded segment; 312. a chute; 313. a second fixing hole; 314. a limiting groove; 32. adjusting a rod; 321. a limiting block; 4. a lifting rope; 5. a lead weight; 6. horizontal bubble; 7. a universal adjusting wheel; 8. a first fixing lever; 9. a second fixing bar; 10. and a support plate.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses engineering is managed and is used foundation ditch displacement measurement device. Referring to fig. 1, the foundation pit displacement measuring device for engineering supervision comprises a fixing plate 1, a detector 2, a lifting rope 4, a lead weight 5 and a supporting assembly 3 for adjusting the height of the detector 2, wherein the fixing plate 1 is rectangular, the fixing plate 1 is horizontally arranged, the detector 2 is positioned on the fixing plate 1, the detector 2 is a distance measuring head, and the bottom of the fixing plate 1 is provided with a limiting hole 101; the lifting rope 4 and the lead weight 5 are both positioned in the limiting hole 101, the lifting rope 4 is a nylon rope, one end of the lifting rope 4 is fixedly bonded with the bottom of the detector 2, the other end of the lifting rope 4 is fixedly bound with the lead weight 5, the lead weight 5 is conical, and the tip of the lead weight 5 faces the ground; the supporting component 3 is arranged at the bottom of the fixing plate 1. When detecting the foundation ditch displacement volume, near the foundation ditch now do and detect the sign, supporting component 3 is placed and is being detected sign department, lead weighs down 5 and falls to ground along spacing hole 101, lead weighs down 5 and drives lifting rope 4 and tighten, when lead weighs down 5 and stops the swing, lead weighs down 5 direct directional identification point, operating personnel detects the identification point on every side through operation detector 2, make things convenient for operating personnel to place detector 2 in same identification point department many times, improve the convenience of testing result contrast data, improve the precision that measuring device placed the position.
Referring to fig. 1 and 2, in order to adjust the angle of the detector 2 conveniently, a universal adjusting wheel 7 is arranged on one side of the detector 2 facing the fixed plate 1, the universal adjusting wheel 7 is spherical, the bottom of the universal adjusting wheel 7 and the bottom of the detector 2 are integrally formed, a sliding cavity 102 is arranged on one side of the fixed plate 1 facing the detector 2, the sliding cavity 102 is spherical, the size and the shape of the sliding cavity 102 are the same as those of the universal adjusting wheel 7, the universal adjusting wheel 7 is rotatably connected with the side wall of the sliding cavity 102, a first fixing hole 103 is arranged on the side wall of the fixed plate 1, a thread is arranged in the first fixing hole 103, the first fixing hole 103 penetrates through the side wall of the fixed plate 1, the first fixing hole 103 is horizontally arranged, a first fixing rod 8 is connected to the thread at the first fixing hole 103, the first fixing rod 8 is a threaded rod, and one end of the first fixing rod 8, which penetrates through the first fixing hole 103, can be abutted against the universal adjusting wheel 7; the detector 2 is glued on top with a horizontal bubble 6. After the detector 2 is placed at the identification point, in order to clearly master the data of the displacement of the foundation pit, multiple points of the foundation pit need to be measured, an operator solves the first fixing rod 8, the first fixing rod 8 is separated from the universal adjusting wheel 7, the fixing state of the universal adjusting wheel 7 is released, the detector 2 is rotated, the universal adjusting wheel 7 rotates in the sliding cavity 102, and the detector 2 and the fixing plate 1 slide; after detector 2 position control accomplished, operating personnel rotated first dead lever 8, and first dead lever 8 and universal regulating wheel 7 support tightly, and detector 2 position is fixed, makes things convenient for detector 2 to measure the interval of foundation ditch identification point, improves measuring device and carries out measuring convenience to the foundation ditch.
Referring to fig. 2 and 3, in order to facilitate carrying of the measuring device, the supporting assembly 3 includes a plurality of supporting rods 31 and a plurality of adjusting rods 32, the supporting rods 31 are cylindrical, three supporting rods 31 may be provided, and four supporting rods 31 may also be provided, in this embodiment, three supporting rods 31 are provided, the supporting rods 31 are obliquely provided, and the three supporting rods 31 are arranged symmetrically with respect to the center of the fixing plate 1; a threaded section 311 is integrally formed at one end of the support rod 31 facing the fixed rod, a threaded hole 104 is formed in one side of the fixed plate 1 facing the threaded section 311, the threaded section 311 extends into the threaded hole 104, and the threaded section 311 is in threaded connection with the side wall of the threaded hole 104; adjust pole 32 for cylindrically, the radius of adjusting pole 32 is less than the radius of bracing piece 31, adjust the pole 32 and be located the bracing piece 31 and keep away from the one end of fixed plate 1, the quantity of adjusting pole 32 is the same with the quantity of bracing piece 31, it is coaxial with bracing piece 32 to adjust pole 32, be provided with the spout 312 that laminates mutually with the outer wall of adjusting pole 32 on the bracing piece 31, adjust pole 32 and spout 312 lateral wall sliding connection, second fixed orifices 313 has been seted up on the spout 312 lateral wall, also be equipped with the screw thread in the second fixed orifices 313, the axis direction of second fixed orifices 313 is perpendicular with the axis direction of bracing piece 31, second fixed orifices 313 female connection has second dead lever 9, the one end that second dead lever 9 stretched into second fixed orifices 313 can support tightly with adjusting pole 32 lateral wall. After the measuring device measures the foundation pit, when the measured identification point needs to be changed, an operator rotates the support rod 31, the threaded section 311 and the fixed rod rotate relatively, the threaded section 311 is separated from the fixed plate 1, and the overall weight of the measuring device is reduced; when there is debris on foundation ditch surface to lead to detector 2 to be difficult to the perpendicular to foundation ditch surface to support, operating personnel is to rotating second dead lever 9, second dead lever 9 rotates along second fixed orifices 313, second dead lever 9 and regulation pole 32 separation, it slides along spout 312 to adjust pole 32, detector 2 places the completion back, operating personnel rotates second dead lever 9, second dead lever 9 supports tightly with adjusting pole 32, reduce detector 2 and place the skew possibility that leads to empting, improve measuring device and carry out the convenience that detects to the foundation ditch displacement.
Referring to fig. 2, in order to improve the stability of the measuring device during use, one end of the adjusting rod 32, which is away from the supporting rod 31, is provided with a supporting plate 10, the supporting plate 10 is in a rectangular parallelepiped shape, the number of the supporting plates 10 is three, the supporting rod 31 and the adjusting rod 32 are in one-to-one correspondence, the supporting plate 10 and the adjusting rod 32 are connected and placed by welding or hinging, and in this embodiment, the supporting plate 10 and the adjusting rod 32 are spherically hinged. When the ground of foundation ditch is uneven, when the backup pad 10 was placed on ground, the ground laminating of backup pad 10 and foundation ditch reduced the regulation pole 32 and supported the possibility that detector 2 took place the slope, and backup pad 10 also can improve the area of contact of regulation pole 32 and ground, and the possibility that takes place to empty when reducing bracing piece 31 and supporting detector 2 reduces detector 2 and takes place the possibility of damaging.
Referring to fig. 2 and 3, in order to reduce the possibility of separation between the support rod 31 and the adjustment rod 32 during the sliding process, the support rod 31 is provided with a limit groove 314, the limit groove 314 is cylindrical, the radius of the limit groove 314 is greater than that of the sliding groove 312, the limit groove 314 is located on one side of the sliding groove 312 close to the fixing plate 1, and the limit groove 314 and the sliding groove 312 are coaxially arranged; the adjusting rod 32 is provided with a limiting block 321 on one side facing the limiting groove 314, the limiting block 321 is cylindrical, the limiting block 321 and the adjusting rod 32 are integrally formed, the limiting block 321 and the adjusting rod 32 are coaxially arranged, and the limiting block 321 is slidably connected with the side wall of the limiting groove 314. When the adjusting rod 32 slides in the sliding groove 312, after the limiting block 321 is attached to the limiting groove 314, the adjusting rod 32 is limited in the limiting groove 314, so that the possibility of losing the adjusting rod 32 is reduced, and the convenience of measuring the displacement of the foundation pit by the measuring device is improved.
The implementation principle of the foundation pit displacement measuring device for engineering supervision in the embodiment of the application is as follows: when the position of a foundation pit needs to be measured, the threaded section 311 is rotated first, the threaded section 311 is in threaded connection with the fixing plate 1, the supporting rod 31 and the fixing plate 1 are connected into a whole, the supporting plate 10 is firstly contacted with the ground of the foundation pit, the second fixing rod 9 is unlocked, the second fixing rod 9 is separated from the adjusting rod 32, the adjusting rod 32 slides along the sliding groove 312, the levelness of the detector 2 is adjusted by observing the horizontal bubble 6, the lifting rope 4 and the lead weight 5 penetrate through the limiting hole 101 and vertically penetrate through the mark on the foundation pit, the second fixing rod 9 is rotated, the second fixing rod 9 abuts against the side wall of the adjusting rod 32, an operator measures the distance of a displacement mark point of the foundation pit, when measuring the displacement mark point of the foundation pit in other directions, the operator unlocks the first fixing rod 8, the universal adjusting wheel 7 is unlocked, the operator rotates the detector 2, the universal adjusting wheel 7 rolls, the angle of the detector 2 is changed, and only the first fixing rod 8 is rotated, the first fixing bar 8 holds the detector 2 tightly. The application can improve the accuracy of the placement position of the measuring device.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides an engineering is foundation ditch displacement measurement device for supervision, includes fixed plate (1), detector (2) and supporting component (3) that support detector (2), detector (2) are located fixed plate (1), supporting component (3) are located fixed plate (1) bottom, its characterized in that: spacing hole (101) have been seted up to fixed plate (1) bottom, still include lifting rope (4) and lead weight (5), spacing hole (101) are passed to lifting rope (4) one end and detector (2) bottom is connected, lifting rope (4) other end and lead weight (5) fixed connection.
2. The foundation pit displacement measuring device for engineering supervision as claimed in claim 1, wherein: the detector (2) top is provided with the horizontal ball, detector (2) are provided with universal regulating wheel (7) towards fixed plate (1) one side, fixed plate (1) is provided with smooth chamber (102) towards detector (2) one side, universal regulating wheel (7) and smooth chamber (102) lateral wall rotate to be connected, fixed plate (1) lateral wall is provided with first fixed orifices (103), threaded connection is located in first fixed orifices (103) has first dead lever (8), first dead lever (8) lateral wall can support tightly with universal regulating wheel (7).
3. The foundation pit displacement measuring device for engineering supervision as claimed in claim 1, wherein: the supporting component (3) comprises a plurality of supporting rods (31), one ends of the supporting rods (31) are connected with the bottom of the fixing plate (1), and the supporting rods (31) are arranged in a central symmetry mode relative to the fixing plate (1).
4. A foundation pit displacement measuring device for engineering supervision according to claim 3, characterized in that: bracing piece (31) one side fixedly connected with screw thread section (311) towards fixed plate (1), screw thread section (311) stretches into fixed plate (1), bracing piece (31) and fixed plate (1) can dismantle the connection through the screw thread.
5. A foundation pit displacement measuring device for engineering supervision according to claim 3, characterized in that: the supporting assembly (3) further comprises an adjusting rod (32), the adjusting rod (32) is provided with a plurality of parts, one end, far away from the fixing plate (1), of the supporting rod (31) is provided with a sliding groove (312), the adjusting rod (32) is located at the sliding groove (312), the adjusting rod (32) is connected with the side wall of the sliding groove (312) in a sliding mode, a second fixing hole (313) is formed in the side wall of the sliding groove (312), a second fixing rod (9) is arranged in the second fixing hole (313), and the second fixing rod (9) can be tightly abutted to the side wall of the adjusting rod (32).
6. The foundation pit displacement measuring device for engineering supervision as claimed in claim 5, wherein: the support rod (31) is provided with a limiting groove (314), the limiting groove (314) is located on one side, close to the fixing plate (1), of the sliding groove (312), the adjusting rod (32) is provided with a limiting block (321) towards one side of the limiting groove (314), the limiting block (321) is fixedly connected with the adjusting rod (32), and the limiting block (321) is connected with the side wall of the limiting groove (314) in a sliding mode.
7. The foundation pit displacement measuring device for engineering supervision as claimed in claim 5, wherein: one end of the adjusting rod (32) far away from the supporting rod (31) is provided with a supporting plate (10), and the supporting plate (10) is connected with the adjusting rod (32).
8. The foundation pit displacement measuring device for engineering supervision as claimed in claim 7, wherein: the supporting plate (10) is hinged with the adjusting rod (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121169065.0U CN215330079U (en) | 2021-05-27 | 2021-05-27 | Engineering is managed and is used foundation ditch displacement measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121169065.0U CN215330079U (en) | 2021-05-27 | 2021-05-27 | Engineering is managed and is used foundation ditch displacement measurement device |
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| Publication Number | Publication Date |
|---|---|
| CN215330079U true CN215330079U (en) | 2021-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121169065.0U Active CN215330079U (en) | 2021-05-27 | 2021-05-27 | Engineering is managed and is used foundation ditch displacement measurement device |
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| Country | Link |
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| CN (1) | CN215330079U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117948953A (en) * | 2024-03-26 | 2024-04-30 | 邢台路桥建设集团有限公司 | Perpendicularity detection equipment for traffic engineering construction |
-
2021
- 2021-05-27 CN CN202121169065.0U patent/CN215330079U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117948953A (en) * | 2024-03-26 | 2024-04-30 | 邢台路桥建设集团有限公司 | Perpendicularity detection equipment for traffic engineering construction |
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Address after: Room 603, building 13, West Yungu phase I, Fengxi new town, Xixian New District, Xi'an, Shaanxi 710003 Patentee after: Xi'an Railway First Design&Research Institute Engineering Consulting Management Co.,Ltd. Address before: Room 603, building 13, West Yungu phase I, Fengxi new town, Xixian New District, Xi'an, Shaanxi 710003 Patentee before: Xi'an first railway engineering consulting and Supervision Co.,Ltd. |
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