CN210665306U - Anchor strength detection device for support anchor rod - Google Patents
Anchor strength detection device for support anchor rod Download PDFInfo
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- CN210665306U CN210665306U CN201920861416.0U CN201920861416U CN210665306U CN 210665306 U CN210665306 U CN 210665306U CN 201920861416 U CN201920861416 U CN 201920861416U CN 210665306 U CN210665306 U CN 210665306U
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- joint
- support anchor
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Abstract
The utility model provides a support stock anchoring strength detection device, which belongs to the technical field of engineering measurement, and how to rapidly carry out tensile, compression and bending resistance detection on the anchoring strength of a support stock, the device comprises a base, two bilaterally symmetrical installation seats are welded at the upper end of the base, an installation frame is fixed at the upper end of the installation seat, a hydraulic machine is fixedly installed at the upper end of the installation frame, a clamping joint is connected with the lower end of the hydraulic machine, the lower end of the clamping joint is clamped with the support stock, the lower end of the support stock is inserted into a pressure detection mechanism, the pressure detection mechanism is installed at the upper end of the base and is used for the compression resistance detection of the support stock, a hydraulic oil tank is installed at; the lower end of the mounting frame is provided with a tension sensing mechanism; the utility model discloses can carry out resistance to compression, tensile detection and bending resistance detection to strutting the stock, adopt data display real-time display to detect and remain the biggest data, convenient follow-up statistics, it is multiple functional, application scope is wide.
Description
Technical Field
The utility model belongs to the technical field of the engineering survey, specifically a strut stock anchoring strength detection device.
Background
The support anchor rod is a reinforcing and supporting mode adopted in surface engineering such as side slopes, rock-soil deep foundation pits and the like and underground chamber construction such as tunnels, stopes and the like. The method is characterized in that a pole column is made of metal pieces, wood pieces, polymer pieces or other materials, and is driven into a hole which is drilled in advance in an earth surface rock body or a rock body around a chamber, and the special structure of the head part and the pole body and a tail supporting plate (which can be omitted) are utilized, or the surrounding rock and a stable rock body are combined together by depending on the bonding action to generate the suspension effect, the combination beam effect and the reinforcing effect, so that the aim of supporting is fulfilled. The method has the advantages of low cost, good supporting effect, simple and convenient operation, flexible use, less occupied construction clearance and the like.
The support anchor rod can meet the requirement of reinforcement support only by certain strength, but the existing detection device has a single function, can only complete the detection of the anchoring strength in one direction, and has the defects of small application range and low test efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims at having the above-mentioned problem to current technique, provided a strut stock anchor intensity detection device, the technical problem that this strut stock anchor intensity detection device will solve is: how to carry out tensile resistance to compression bending resistance detection to the anchor strength of supporting stock fast.
The purpose of the utility model can be realized by the following technical proposal:
a supporting anchor rod anchoring strength detection device comprises a base, wherein two bilaterally symmetrical installation seats are welded at the upper end of the base, an installation frame is fixed at the upper end of each installation seat, a hydraulic machine is fixedly installed at the upper end of each installation frame, the lower end of the hydraulic machine is connected with a clamping joint, the lower end of the clamping joint is clamped with a supporting anchor rod, the lower end of the supporting anchor rod is inserted into a pressure detection mechanism, the pressure detection mechanism is installed at the upper end of the base and used for compression resistance detection of the supporting anchor rod, a hydraulic oil tank is installed at the front end of the base, a data display is; and a tension sensing mechanism is arranged at the lower end of the mounting frame.
The utility model discloses a theory of operation is: the support anchor rod is installed at the lower end of the clamping connector, the hydraulic oil tank is controlled to supply oil to the hydraulic machine through the button control box, a hydraulic rod of the hydraulic machine downwards pushes the support anchor rod, the support anchor rod downwards pushes the pressure detection mechanism, the pressure detection mechanism transmits pressure data to the data display to be displayed, and finally the maximum pressure data is reserved and displayed and is compared with the rated pressure intensity to carry out compression resistance detection on the support anchor rod.
The clamping joint is replaced by a pulling joint, the lower end of the tension sensing mechanism is fixedly provided with a support anchor rod, the lower end of the support anchor rod is connected with the pulling joint, and the other side of the pulling joint is connected to the lower end of the hydraulic machine and used for tensile detection of the support anchor rod.
By adopting the structure, the support anchor rod is arranged between the tension sensing mechanism and the pull joint, the hydraulic oil tank is controlled by the key control box to supply oil to the hydraulic machine, the hydraulic rod of the hydraulic machine pulls the pull joint downwards, the support anchor rod pulls the tension sensing mechanism downwards, the tension sensing mechanism transmits tension data to the data display to be displayed, and finally the maximum pressure data is kept to be displayed and compared with the rated tension to carry out the tensile detection of the support anchor rod.
The joint head includes joint sleeve, joint installation nut and draw-in groove, and both ends welding has the joint installation nut of two symmetries around the joint sleeve, joint sleeve lower extreme welding draw-in groove.
By adopting the structure, the clamping sleeve is used for installing the hydraulic rod of the hydraulic machine and installing the locking bolt through the clamping installation nut to be locked and fixed, and the clamping groove is used for installing the upper nut of the supporting anchor rod and is used for fixing the supporting anchor rod.
The pressure detection mechanism comprises a pressure seat, an installation cylinder and a pressure sensor, the installation cylinder is welded in the middle of the pressure seat, and the pressure sensor is installed at the lower end of the pressure seat.
By adopting the structure, the mounting tube is convenient for mounting the anchor head of the supporting anchor rod, and the pressure sensor records the pressure in real time and transmits the pressure to the data display.
The pull joint is replaced by a bending-resistant joint, the bending-resistant base is placed at the upper end of the pressure detection mechanism, and a support anchor rod is placed between the bending-resistant joint and the bending-resistant base and used for bending-resistant detection of the support anchor rod.
By adopting the structure, the hydraulic oil tank is controlled by the key control box to supply oil to the hydraulic machine, the hydraulic rod of the hydraulic machine pushes the bending-resistant joint to move downwards, the support anchor rod pushes the bending-resistant base downwards, the bending-resistant base pushes the pressure detection mechanism downwards, the pressure detection mechanism transmits pressure data to the data display to be displayed, and finally the maximum pressure data is kept to be displayed and compared with the rated pressure intensity to carry out bending-resistant detection on the support anchor rod.
The pull joint comprises a pull joint sleeve, a pull joint mounting nut, a pull joint seat and a pull joint through hole, wherein the left side of the upper end of the pull joint seat is welded with the pull joint sleeve, the front end and the rear end of the pull joint sleeve are welded with two symmetrical pull joint mounting nuts, and the right side of the upper end of the pull joint seat is provided with the pull joint through hole.
By adopting the structure, the hydraulic rod and the support anchor rod of the hydraulic machine can be conveniently installed by the drawing sleeve, so that the support anchor rod is driven to be drawn downwards to carry out tensile detection.
The bending-resistant joint comprises a bending-resistant sleeve, a bending-resistant mounting nut and a bending-resistant clamping groove, the bending-resistant sleeve is welded at the upper end of the bending-resistant clamping groove, and two symmetrical bending-resistant mounting nuts are welded at the front end and the rear end of the bending-resistant sleeve.
By adopting the structure, the hydraulic rod of the hydraulic machine can be conveniently installed on the bending-resistant sleeve, and the bending-resistant clamping groove is pushed and pressed downwards to support the anchor rod.
The bending-resistant base comprises bending-resistant butt joint bottom grooves, a bending-resistant base body and positioning columns, the two bending-resistant butt joint bottom grooves are bilaterally symmetrical at the upper end of the bending-resistant base body, and the positioning columns are welded in the middle of the upper end of the bending-resistant base body.
By adopting the structure, the positioning column is arranged inside the installation barrel, the support anchor rod is placed inside the bending-resistant butt joint bottom groove and matched with the bending-resistant clamping groove, and bending resistance detection of the support anchor rod is carried out.
The hydraulic oil tank is electrically connected with the key control box, and the data display is electrically connected with the tension sensing mechanism and the pressure sensor respectively.
By adopting the structure, the method is used for rapidly collecting the detection statistical data.
Compared with the prior art, this strut stock anchor strength detection device has following advantage:
1. and (3) matching the hydraulic machine with the clamping joint and the pressure detection mechanism to perform compression resistance detection on the support anchor rod.
2. Adopting a hydraulic machine to be matched with a pull joint and a tension sensing mechanism to carry out tension detection on the support anchor rod;
3. performing anti-bending detection on the support anchor rod by matching a hydraulic machine with the anti-bending joint, the anti-bending base and the pressure detection mechanism;
4. the utility model discloses a data display shows in real time and detects and remain the biggest data, convenient follow-up statistics.
Drawings
Fig. 1 is a schematic structural view of compression resistance detection of a device for detecting anchoring strength of a support anchor rod;
fig. 2 is a schematic cross-sectional view of the compression resistance detection of the device for detecting the anchoring strength of the support anchor rod;
fig. 3 is a schematic structural view of a clamping head in the device for detecting the anchoring strength of the support anchor rod;
fig. 4 is a schematic structural view of tensile detection of the device for detecting the anchoring strength of the support anchor rod;
fig. 5 is a schematic structural view of a tie-in head in the device for detecting the anchoring strength of the support anchor rod;
fig. 6 is a schematic structural view of bending resistance detection of the device for detecting the anchoring strength of the support bolt;
fig. 7 is a schematic structural view of an anti-bending joint in the device for detecting the anchoring strength of the support anchor rod;
FIG. 8 is a schematic structural view of a bending-resistant base in the anchoring strength detecting device for the support anchor rod;
in the figure: 1-base, 2-mounting base, 3-mounting base, 4-hydraulic press, 5-clamping joint, 5 a-clamping sleeve, 5 b-clamping mounting nut, 5 c-clamping groove, 6-support anchor rod, 7-pressure detection mechanism, 7 a-pressure base, 7 b-mounting cylinder, 7 c-pressure sensor, 8-data display, 9-hydraulic oil tank, 10-key control box, 11-tension sensing mechanism, 12-pulling joint, 12 a-pulling sleeve, 12 b-pulling mounting nut, 12 c-pulling seat, 12 d-pulling through hole, 13-bending joint, 13 a-bending sleeve, 13 b-bending mounting nut, 13 c-bending clamping groove, 14-bending base, 14-bending joint, 14 a-bending-resistant butt joint bottom groove, 14 b-bending-resistant seat body and 14 c-positioning column.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Referring to fig. 1-8, this embodiment provides a device for detecting anchoring strength of a supporting anchor rod, which includes a base 1, two bilaterally symmetric installation bases 2 welded to the upper end of the base 1, an installation frame 3 fixed to the upper end of the installation base 2, a hydraulic machine 4 fixed to the upper end of the installation frame 3 for providing a downward force (pressure or tension), a bayonet joint 5 connected to the lower end of the hydraulic machine 4, a supporting anchor rod 6 clamped to the lower end of the bayonet joint 5, a pressure detection mechanism 7 inserted into the lower end of the supporting anchor rod 6 for detecting pressure resistance of the supporting anchor rod 6, a hydraulic oil tank 9 installed at the front end of the base 1 for providing hydraulic pressure, a data display 8 installed at the upper end of the hydraulic oil tank 9 (the data display 8 is a conventional technology and is directly purchased in the market and ready to use), displaying data in real time, and recording the maximum pressure, a key control box 10 is arranged at the right end of the hydraulic oil tank 9 and used for controlling the start-stop work of the hydraulic machine 4, and a tension sensing mechanism 11 (the model of a tension sensor on the tension sensing mechanism 11 is DYLY-102, and the tension sensing mechanism can be directly purchased in the market and used) is arranged at the lower end of the mounting frame 3; the clamping joint 5 is replaced by a pulling joint 12, a support anchor rod 6 is fixed at the lower end of the tension sensing mechanism 11, the lower end of the support anchor rod 6 is connected with the pulling joint 12, and the other side of the pulling joint 12 is connected with the lower end of the hydraulic machine 4 and used for tensile detection of the support anchor rod 6; the clamping joint 5 comprises a clamping sleeve 5a, clamping mounting nuts 5b and clamping grooves 5c, the front end and the rear end of the clamping sleeve 5a are welded with the two symmetrical clamping mounting nuts 5b to lock and fix a hydraulic rod of the hydraulic machine 4, the lower end of the clamping sleeve 5a is welded with the clamping grooves 5c, and a clamping support anchor rod 6 is mounted; the pressure detection mechanism 7 comprises a pressure seat 7a, an installation barrel 7b and a pressure sensor 7c, the installation barrel 7b is welded in the middle of the pressure seat 7a, the support anchor rod 6 is installed and clamped, the pressure sensor 7c (the pressure sensor 7c is JHBM-H1 in the model number, and can be directly purchased in the market and used) is installed at the lower end of the pressure seat 7a, and the transmission pressure is detected in real time; the pull joint 12 is replaced by a bending-resistant joint 13, a bending-resistant base 14 is arranged at the upper end of the pressure detection mechanism 7, and a support anchor rod 6 is arranged between the bending-resistant joint 13 and the bending-resistant base 14 and used for bending-resistant detection of the support anchor rod 6; the pull joint 12 comprises a pull-joint sleeve 12a, a pull-joint mounting nut 12b, a pull-joint base 12c and a pull-joint through hole 12d, the left side of the upper end of the pull-joint base 12c is welded with the pull-joint sleeve 12a, a hydraulic rod of the hydraulic machine 4 is mounted, the front end and the rear end of the pull-joint sleeve 12a are welded with two symmetrical pull-joint mounting nuts 12b, the hydraulic rod of the hydraulic machine 4 is locked and fixed, and the right side of the upper end of the pull-joint base 12c is provided with the pull-joint through hole 12d for mounting the support; the bending-resistant joint 13 comprises a bending-resistant sleeve 13a, a bending-resistant mounting nut 13b and a bending-resistant clamping groove 13c, the bending-resistant sleeve 13a is welded at the upper end of the bending-resistant clamping groove 13c, a hydraulic rod of the hydraulic machine 4 is mounted, two symmetrical bending-resistant mounting nuts 13b are welded at the front end and the rear end of the bending-resistant sleeve 13a, and the hydraulic rod of the hydraulic machine 4 is locked and fixed; the bending-resistant base 14 comprises bending-resistant butt joint bottom grooves 14a, a bending-resistant base body 14b and positioning columns 14c, the two bending-resistant butt joint bottom grooves 14a which are bilaterally symmetrical are arranged at the upper end of the bending-resistant base body 14b, a support anchor rod 6 is arranged at the upper end of the bending-resistant base body 14b, and the positioning columns 14c are welded in the middle of the upper end of the bending-resistant base body 14b and matched with the installation cylinder 7b to fix the bending; the hydraulic oil tank 9 is electrically connected with the key control box 10, and the data display 8 is respectively electrically connected with the tension sensing mechanism 11 and the pressure sensor 7 c.
The utility model discloses a theory of operation:
the utility model provides a support stock anchor strength detection device, one, when carrying out the resistance to compression of supporting stock 6 and detecting, joint 5 installs on the hydraulic stem of hydraulic press 4, joint 5 lower extreme joint supports stock 6, support stock 6 lower extreme insertion pressure detection mechanism 7, the staff, control hydraulic tank 9 through button control box 10 and supply oil to hydraulic press 4, the hydraulic stem of hydraulic press 4 bulldozes support stock 6 downwards, support stock 6 bulldozes pressure detection mechanism 7 downwards, pressure detection mechanism 7 transmits pressure data to data display 8 and shows, remain at last and show the biggest pressure data, compare with rated pressure intensity, it is qualified when can reach required pressure intensity;
when the tensile strength of the support anchor rod 6 is detected, one end of a pull joint 12 is installed on a hydraulic rod of the hydraulic machine 4, the other end of the pull joint 12 is clamped with the support anchor rod 6, the upper end of the support anchor rod 6 is connected and installed at the lower end of a tension sensing mechanism 11, a worker controls a hydraulic oil tank 9 to supply oil to the hydraulic machine 4 through a key control box 10, the hydraulic rod of the hydraulic machine 4 pushes and pulls the pull joint 12 downwards, the pull joint 12 pulls the support anchor rod 6 downwards, the support anchor rod 6 pulls the tension sensing mechanism 11 downwards, the tension sensing mechanism 11 transmits tension data to a data display 8 to be displayed, and finally, the maximum pressure data is reserved and displayed, compared with the rated tension, the maximum pressure data is qualified when the required tension strength can be reached;
thirdly, when the anti-bending detection of the support anchor rod 6 is carried out, the anti-bending joint 13 is installed at the lower end of the hydraulic rod of the hydraulic machine 4, the support anchor rod 6 is transversely placed on the anti-bending base 14, the hydraulic oil tank 9 is controlled to supply oil to the hydraulic machine 4 through the key control box 10, the hydraulic rod of the hydraulic machine 4 pushes the anti-bending joint 13 downwards, the anti-bending joint 13 pushes the support anchor rod 6 downwards, the support anchor rod 6 pushes the anti-bending base 14 downwards, the anti-bending base 14 pushes the pressure detection mechanism 7 downwards, the pressure detection mechanism 7 transmits pressure data to the data display 8 to display the pressure data, and finally the maximum pressure data is reserved and displayed, and is qualified when the required pressure intensity can be reached by comparing the.
The utility model adopts the hydraulic machine 4 to match with the clamping head 5 and the pressure detection mechanism 7 to detect the compression resistance of the anchoring strength of the supporting anchor rod 6; adopting a hydraulic machine 4 to be matched with a pull joint 12 and a tension sensing mechanism 11 to carry out tensile detection on the anchoring strength of the support anchor rod 6; the hydraulic machine 4 is matched with the bending-resistant joint 13, the bending-resistant base 14 and the pressure detection mechanism 7 to perform bending-resistant detection on the anchoring strength of the support anchor rod 6; the utility model discloses a data display 8 shows in real time and detects and remain the biggest data, convenient follow-up statistics.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (9)
1. The device for detecting the anchoring strength of the support anchor rod is characterized by comprising a base (1), wherein two bilaterally symmetrical installation seats (2) are welded at the upper end of the base (1), an installation frame (3) is fixed at the upper end of the installation seat (2), a hydraulic machine (4) is fixedly installed at the upper end of the installation frame (3), the lower end of the hydraulic machine (4) is connected with a clamping joint (5), the lower end of the clamping joint (5) is clamped with a support anchor rod (6), the lower end of the support anchor rod (6) is inserted into a pressure detection mechanism (7), the pressure detection mechanism (7) is installed at the upper end of the base (1) and is used for pressure resistance detection of the support anchor rod (6), a hydraulic oil tank (9) is installed at the front end of the base (1), a data display (8) is installed at the upper; the lower end of the mounting rack (3) is provided with a tension sensing mechanism (11).
2. The device for detecting the anchoring strength of the support anchor rod according to claim 1, wherein the clamping head (5) is replaced by a pulling head (12), the lower end of the tension sensing mechanism (11) is used for fixing the support anchor rod (6), the lower end of the support anchor rod (6) is connected with the pulling head (12), and the other side of the pulling head (12) is connected to the lower end of the hydraulic machine (4) and is used for detecting the tensile strength of the support anchor rod (6).
3. The device for detecting the anchoring strength of the support anchor rod according to claim 2, wherein the clamping joint (5) comprises a clamping sleeve (5a), clamping mounting nuts (5b) and clamping grooves (5c), the clamping mounting nuts (5b) are symmetrically welded at the front end and the rear end of the clamping sleeve (5a), and the clamping grooves (5c) are welded at the lower end of the clamping sleeve (5 a).
4. The device for detecting the anchoring strength of the support anchor rod according to claim 1, wherein the pressure detection mechanism (7) comprises a pressure seat (7a), a mounting tube (7b) and a pressure sensor (7c), the mounting tube (7b) is welded in the middle of the pressure seat (7a), and the pressure sensor (7c) is installed at the lower end of the pressure seat (7 a).
5. The anchor strength detecting device of a support bolt according to claim 2, wherein the pulling joint (12) is replaced with a bending-resistant joint (13), a bending-resistant base (14) is placed at the upper end of the pressure detecting mechanism (7), and the support bolt (6) is placed between the bending-resistant joint (13) and the bending-resistant base (14) for bending-resistant detection of the support bolt (6).
6. The device for detecting the anchoring strength of the support anchor rod according to claim 5, wherein the pulling joint (12) comprises a pulling connection sleeve (12a), a pulling connection installation nut (12b), a pulling connection seat (12c) and a pulling connection through hole (12d), the pulling connection sleeve (12a) is welded on the left side of the upper end of the pulling connection seat (12c), the two symmetrical pulling connection installation nuts (12b) are welded on the front end and the rear end of the pulling connection sleeve (12a), and the pulling connection through hole (12d) is formed in the right side of the upper end of the pulling connection seat (12 c).
7. The device for detecting anchoring strength of support anchor rod according to claim 5, wherein the bending-resistant joint (13) comprises a bending-resistant sleeve (13a), a bending-resistant mounting nut (13b) and a bending-resistant clamping groove (13c), the bending-resistant sleeve (13a) is welded at the upper end of the bending-resistant clamping groove (13c), and two symmetrical bending-resistant mounting nuts (13b) are welded at the front end and the rear end of the bending-resistant sleeve (13 a).
8. The anchoring strength detecting device for supporting anchor rod according to claim 5, wherein the bending-resistant base (14) comprises two bending-resistant butt-joint bottom grooves (14a) which are symmetrical left and right, a bending-resistant base body (14b) and a positioning column (14c), the upper end of the bending-resistant base body (14b) is provided with the two bending-resistant butt-joint bottom grooves (14a), and the middle part of the upper end of the bending-resistant base body (14b) is welded with the positioning column (14 c).
9. The device for detecting the anchoring strength of the support anchor rod according to claim 4, wherein the hydraulic oil tank (9) is electrically connected with the key control box (10), and the data display (8) is electrically connected with the tension sensing mechanism (11) and the pressure sensor (7c) respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920861416.0U CN210665306U (en) | 2019-06-10 | 2019-06-10 | Anchor strength detection device for support anchor rod |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920861416.0U CN210665306U (en) | 2019-06-10 | 2019-06-10 | Anchor strength detection device for support anchor rod |
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| CN210665306U true CN210665306U (en) | 2020-06-02 |
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| CN201920861416.0U Active CN210665306U (en) | 2019-06-10 | 2019-06-10 | Anchor strength detection device for support anchor rod |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116296753A (en) * | 2023-03-29 | 2023-06-23 | 淮南师范学院 | Anchor rod detection counterforce device |
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2019
- 2019-06-10 CN CN201920861416.0U patent/CN210665306U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116296753A (en) * | 2023-03-29 | 2023-06-23 | 淮南师范学院 | Anchor rod detection counterforce device |
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Address after: 510378 101-110, 201-207, 301-313, No.7 West Yongshun Avenue, Huangpu District, Guangzhou City, Guangdong Province Patentee after: Guangdong dike construction engineering testing Co.,Ltd. Address before: 510378 room 12, 200 Fangcun Avenue East, Liwan District, Guangzhou City, Guangdong Province Patentee before: Guangzhou dike Electric Power Construction Engineering Testing Co.,Ltd. |
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