CN107363194B - Reserved steel bar means for correcting and its application construction method - Google Patents
Reserved steel bar means for correcting and its application construction method Download PDFInfo
- Publication number
- CN107363194B CN107363194B CN201710609461.2A CN201710609461A CN107363194B CN 107363194 B CN107363194 B CN 107363194B CN 201710609461 A CN201710609461 A CN 201710609461A CN 107363194 B CN107363194 B CN 107363194B
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- outline border
- guide rail
- steel bar
- reserved steel
- crossbeam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F1/00—Bending wire other than coiling; Straightening wire
- B21F1/02—Straightening
Abstract
The present invention relates to a kind of reserved steel bar means for correcting and its application construction methods.The reserved steel bar means for correcting includes outline border, crossbeam, sleeve, the first guide rail, the second guide rail, limit plate and at least two extension sections.Outline border includes the first outline border and the second outline border.Sleeve is through crossbeam, and the first guide rail is opened in the first outline border close to the surface of crossbeam, and crossbeam is connect with the first outline border by the first guide rail and slided along the first outline border.Limit plate is perpendicular to the plane where outline border.Second guide rail is opened in the second outline border close to the surface of limit plate, and limit plate is connect with the second outline border by the second guide rail and slided along the second outline border.At least two extension sections are located on the first outline border, and extension section one end is connect with the first outline border, and the other end is hung with snap-gauge.Above-mentioned reserved steel bar means for correcting straightening precision is high and straightening effect is good.Application construction method using above-mentioned reserved steel bar means for correcting is easy to operate, and straightening effect is good.
Description
Technical field
The present invention relates to technical field of civil engineering, more particularly to reserved steel bar means for correcting and its application and construction side
Method.
Background technique
During China is in Rapid-Urbanization development, industrialization build be the development of current building engineering field must
Right trend.Wherein, prefabricated assembled concrete frame construction system and prefabricated assembled concrete shear wall are that China is normal at present
Industrialized building structural system.Prefabricated assembled concrete shear wall is transported to construction site after factory process production, so
Structural elements is linked as entirety by the methods of pouring after various connecting structure and concrete afterwards, such assembly method is to be suitble to China
The residential industrialized building system of national conditions is widely used in China's multi-storey and sub high-rise residence building, is particularly suitable for public affairs and rents a house and protection
House.
The connecting structure of prefabricated assembled concrete wall is the key factor for influencing safety of structure and construction efficiency, mesh
The preceding vertical connection type of common precast shear wall is divided into reserving hole channel grouting connection and connects with steel bushing.However, no matter which
Kind connection type, the reinforcing bar that wall end is stretched out are required to position accurately (within ± 5mm), and otherwise stretching reinforcing bar can not enter and leave pre-
Box out mouth or sleeve-port.Therefore, in order to guarantee the integrated connection quality of wall body structure, the position correction of wallboard exposed steel bar is to closing
It is important.
However, since prefabricated assembled concrete wall is in the mistake of production, transport, stacking from precast plant to construction site
Cheng Zhong, reinforcing bar are collided with etc. by the external world and are easy to happen bending in the case where external force, it is therefore desirable to first to reserved before assembling construction
The reinforcing bar of exposing carries out straightening processing, and the position to guarantee reinforcing bar is accurate.Generally, the simple works such as crow bar, steel pipe are used only
Tool carries out straightening work to reinforcing bar, and the operation of worker also more arbitrarily, results in that bar straightening precision is low, and straightening effect is poor.
Summary of the invention
Based on this, it is necessary to low for bar straightening precision, straightening effect difference problem, provide a kind of straightening precision it is high,
Straightening effect good reserved steel bar means for correcting and its application construction method.
A kind of reserved steel bar means for correcting, comprising:
Outline border, the second outline border being arranged including the first outline border for being arranged in the width direction and along its length；
Crossbeam, both ends are located on first outline border, and are in same plane with the outline border；
Sleeve, through the crossbeam, the central axis of the sleeve is in the plane where the outline border；
First guide rail is arranged along first outline border, and the crossbeam is connected by first guide rail and first outline border
It connects；
Second guide rail is arranged along second outline border；
Limit plate, perpendicular to the plane where the outline border, the limit plate passes through second guide rail and described first
Outline border connection；
At least two extension sections are located on first outline border, and described extension section one end and first outline border connect
It connects, the other end is hung with snap-gauge.
The end of the sleeve is equipped with introduction part in one of the embodiments, and the diameter of the introduction part is from the set
The end of cylinder becomes larger.
The quantity of the sleeve is multiple in one of the embodiments, and multiple sleeves are uniformly arranged on the cross
Liang Zhong.
First guide rail is the groove for being opened in first outline border in one of the embodiments, and described first leads
The shape of rail and the shape of the end of the crossbeam match, and the end of the crossbeam is embedded in first guide rail and along described
The sliding of first guide rail.
Multiple first limit holes, adjacent first limit are offered on first guide rail in one of the embodiments,
The distance in position hole is equal with the width of the crossbeam.
Second guide rail is the groove for being opened in second outline border in one of the embodiments, and described second leads
The shape of rail and the end shape of the limit plate match, and the end of the limit plate is embedded in second guide rail and along institute
State the sliding of the second guide rail.
Multiple second limit holes are offered on second guide rail in one of the embodiments,.
It is additionally provided with power tightening part in one of the embodiments, the power tightening part is set in the extension section.
First outline border is equipped with otic placode in one of the embodiments, and the otic placode offers lug plate holes, the drawing
Extending portion is connect by the lug plate holes with the outline border.
The application construction method of above-mentioned reserved steel bar means for correcting, comprising the following steps:
According to the sectional dimension of precast wall body, the connection of the limit plate Yu second outline border is adjusted by the second guide rail
Position is located at the outline border on the precast wall body；
According to the position of the exposed reserved steel bar of the precast wall body, by first guide rail adjust the crossbeam with
The link position of first outline border makes sleeve described in the reserved steel bar face；
The lower end of the precast wall body is stuck in the snap-gauge, the extension section is tensed, passes through the reserved steel bar
The sleeve completes the correction of the reserved steel bar.
Above-mentioned reserved steel bar means for correcting when in use, first according to the sectional dimension of precast wall body, passes through the second guide rail tune
The link position for saving limit plate and the second outline border makes outline border limit on the wall to be adjusted, further according to the overhanging of wall
Reinforcement location adjusts link position and the fixation of crossbeam and the first outline border by the first guide rail, so that exposed reserved steel bar is just
To sleeve, then the snap-gauge that extension section end is hung is arranged in the end of lower wall body, then tense extension section, so that reserved
Reinforcing bar passes through sleeve, and then completes the correction to reserved steel bar.Reserved steel bar completes straightening, straightening during passing through sleeve
Precision is high and straightening effect is good.The application construction method of above-mentioned reserved steel bar means for correcting is easy to operate, and straightening effect is good.
Detailed description of the invention
Fig. 1 is the top view of the reserved steel bar means for correcting of an embodiment；
Fig. 2 is the schematic enlarged-scale view that the crossbeam of the reserved steel bar means for correcting of an embodiment is connect with the first guide rail；
Fig. 3 is the schematic enlarged-scale view that the limit plate of the reserved steel bar means for correcting of an embodiment is connect with the second guide rail；
Fig. 4 is I-I sectional view of the reserved steel bar means for correcting shown in FIG. 1 before application and construction；
Fig. 5 is I-I sectional view of the reserved steel bar means for correcting shown in FIG. 1 after application and construction；
Fig. 6 is the I-I sectional view of precast wall body lower end of the reserved steel bar means for correcting shown in FIG. 1 in application and construction.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
As shown in figures 1 to 6, the reserved steel bar means for correcting 1 of an embodiment includes outline border 10, crossbeam 11, sleeve 12, first
Guide rail 13, limit plate 14, the second guide rail 15 and at least two extension sections 16.Outline border 10 includes first be arranged in the width direction
Outline border 100 and the second outline border 102 being arranged along its length.The both ends of crossbeam 11 are located on the first outline border 100, and with
Outline border 10 is in same plane.Sleeve 12 is through crossbeam 11, and the central axis of sleeve 12 is in the plane where outline border 10.The
One guide rail 13 is opened in the first outline border 100 close to the surface of crossbeam 11, and crossbeam 11 is connected by the first guide rail 13 and the first outline border 100
It connects and is slided along the first outline border 100.Limit plate 14 is perpendicular to the plane where outline border 10.Second guide rail 15 is opened in the second outline border
102 are connect and along the second outline border 102 close to the surface of limit plate 14, limit plate 14 by the second guide rail 15 with the second outline border 102
Sliding.At least two extension sections 16 are located on the first outline border 100, and 16 one end of extension section is connect with the first outline border 100, separately
One end is hung with snap-gauge 160.
Above-mentioned reserved steel bar means for correcting 1 when in use, first according to the sectional dimension of precast wall body 2, passes through the second guide rail
15 adjust the link position of limit plate 14 and the second outline border 102, make the limit of outline border 10 on the precast wall body 2 to be adjusted,
Further according to the position of the overhanging reserved steel bar 20 of precast wall body 2, crossbeam 11 and the first outline border 100 are adjusted by the first guide rail 13
Link position and fixation so that exposed 20 face sleeve 12 of reserved steel bar, the snap-gauge that then hangs 16 end of extension section
160 are arranged in the end of lower part precast wall body 2, finally tense extension section 16, so that reserved steel bar 20 passes through sleeve 12, and then complete
The correction of pairs of reserved steel bar 20.
Referring to Fig. 1, in the present embodiment, outline border 10 is rectangle structure, and broadside is the first outline border 100, long side the
Two outline borders 102.In the present embodiment, the section of outline border 10 is channel steel.It is opened respectively on the first outline border 100 and the second outline border 102
Equipped with the first guide rail 13 and the second guide rail 15, crossbeam 11 is moved by the first guide rail 13 on the first outline border 100, into
And the position of crossbeam 11 is adjusted according to the position of reserved steel bar 20 on precast wall body 2.Limit plate 14 can lead to
It crosses the second guide rail 15 to move on the second outline border 102, allows the position of limit plate 14 according to the sectional dimension of precast wall body 2
It is adjusted, so that reserved steel bar means for correcting 1 is suitable for the precast wall body 2 of different cross section size.
Please refer to Fig. 1, Fig. 2 and Fig. 3, crossbeam 11 slides on the first outline border 100 to be realized by the first guide rail 13
's.In the present embodiment, the first outline border 100 includes the upper surface far from crossbeam 11 and the lower surface close to crossbeam 11, the first guide rail
13 be the groove for being provided with the lower surface of the first outline border 100.Wherein, the first guide rail 13 is the length direction along the first outline border 100
Extend.The both ends of crossbeam 11 are T font convex block, and the shape of the first guide rail 13 and the shape of T font convex block match, crossbeam 11
End is embedded in by T font convex block to be realized the connection with the first outline border 100 and slides along the first outline border 100 in the first guide rail 13
It is dynamic.
Further, as shown in figure 3, in the present embodiment, the second outline border 102 includes the upper table far from limit plate 14
The lower surface in face and close limit plate 14.Second guide rail 15 is the groove for being opened in the lower surface of the second outline border 102, wherein the
Two guide rails 15 are extended along the length direction of the second outline border 102.Limit plate 14 is T font close to the end of the second outline border 102
Convex block.The shape of second guide rail 15 and the shape of T font convex block match.The end of limit plate 14 is embedded by T font convex block
The connection with the second outline border 102 is realized in the second guide rail 15, and is slided along the second outline border 102.
Please refer to Fig. 1 and Fig. 4, in the present embodiment, the quantity of limit plate 14 is four, four limit plates 14
It is located at the vertex of outline border 10.In actual use, four limit plates 14 are stuck in four sides of precast wall body 2
On, prevent the precast wall body 2 in correction course from moving.In the present embodiment, limit plate 14 is that L-type limits steel plate.
Further, as shown in Figure 1, in the present embodiment, the first guide rail 13 offers multiple first limit holes 130,
The distance of adjacent first limit hole 130 is equal with the width of crossbeam 11.First limit hole 130 is for limiting crossbeam 11 first
Link position on outline border 100.When crossbeam 11 adjusts the setting position on the first guide rail 13 according to the position of reserved steel bar 20
It postponing, caging bolt 132 is inserted into the first limit hole 130, the two sides of crossbeam 11 are limited the restriction of bolt 132 respectively at this time,
So that reserved steel bar means for correcting 1 adapts to the reserved steel bar 20 of laterally different number of rows and spacing, to extend reserved steel bar correction
The scope of application of device 1.And when correcting completion, can again crossbeam 11 be adjusted by removing caging bolt 132.At this
In embodiment, the pitch-row of the first limit hole 130 is 25-50mm.
As shown in Figure 1, in the present embodiment, multiple second limit holes 150 are offered on the second guide rail 15.When limit plate 14
After being fastened at the surrounding corner of precast wall body 2 by the second guide rail 15, caging bolt 132 is inserted into the second limit hole 150
In, the position of fixed precast wall body 2 prevents from moving in correction course.In the present embodiment, second limit hole 150
Pitch-row is 50-100mm.
As shown in figure 4, in the present embodiment, the end of sleeve 12 is equipped with introduction part 120, the diameter of introduction part 120 covers certainly
The end of cylinder 12 becomes larger.By taking reserved steel bar means for correcting 1 shown in Fig. 4 as an example, crossbeam 11 includes upper and lower surfaces,
Sleeve 12 is through crossbeam 11.Introduction part 120 is located at sleeve 12 close to the end of 11 lower surface of crossbeam, and introduction part 120
The end of diameter from sleeve 12 becomes larger, that is, the shape of introduction part 120 be similar to it is horn-like, section is arc-shaped.Setting is led
Entering portion 120 can be corrected in order to which curved reinforcing bar protrudes into sleeve 12, increase the convenience of operation, and then improve reinforcing bar
Correct efficiency.
In the present embodiment, sleeve 12 is multiple, and multiple sleeves 12 are uniformly arranged in crossbeam 11.The number of sleeve 12
It can be adjusted according to the number of reserved steel bar 20 exposed in precast wall body 2.In addition, the diameter of sleeve 12 is according to practical feelings
Condition is selected.
When needing the reserved steel bar 20 to precast wall body 2 to be corrected, the lower end of precast wall body 2 is to be fastened on snap-gauge
In 160, snap-gauge 160 is that extension section 16 provides stretching impetus.As shown in figure 4, when the position of crossbeam 11 and limit plate 14 is fixed
After good, 20 face sleeve of reserved steel bar.When practice of construction, with the shortening of the length of extension section 16, reserved steel bar correction dress
It sets the distance between 1 and precast wall body 2 to gradually become smaller, reserved steel bar 20 is squeezed into sleeve 12, and then completes correction, that is, is schemed
Shown in 5.In the present embodiment, snap-gauge 160 is L shape, and quantity is two, is located at the two sides of precast wall body 2.Wherein, block
160 width of plate is 100mm-200mm, length 300mm-500mm.In addition, the size of snap-gauge 160 can be according to the actual situation
It is selected, for example, the size of snap-gauge 160 can be increased when precast wall body 2 is larger and heavier.And if precast wall body 2
When smaller and lighter, then it can choose the lesser snap-gauge 160 of size.
As shown in fig. 6, in the present embodiment, being additionally provided with power tightening part 17, power tightening part 17 is arranged in extension section 16
In.Power tightening part 17 can control the elongation and shortening of extension section 16, and then realize the into and out sleeve of reserved steel bar 20
12.In the present embodiment, extension section 16 is steel zipper, and power tightening part 17 can be motor and pulley.
In addition, otic placode 104 offers ear as shown in figure 4, in the present embodiment, the first outline border 100 is equipped with otic placode 104
Plate hole 106, extension section 16 are connect by lug plate holes 106 with outline border 10.The otic placode 104 of two the first outline borders 100 is symmetrical arranged, and is drawn
16 one end of extending portion is arranged in lug plate holes 106, and the other end hangs snap-gauge 160.Otic placode 104 is used to apply pulling force to means for correcting 1,
One or more otic placodes 104 can be set on first outline border 100 according to 20 actual loading situation of reserved steel bar in precast wall body 2.
Simultaneously otic placode 104 and snap-gauge 160 are set, can to avoid on 2 component of precast wall body opening holes with fix reserved steel bar correction
Device 1 so as to avoid the damage of precast wall body 2, and reduces workload.
When above-mentioned reserved steel bar means for correcting 1 is installed, the mobile limit plate 14 of the second guide rail 15 is first passed through, four limit plates are made
14 are stuck at four side angles of precast wall body 2, at this point, outline border 10 is limited in the top of precast wall body 2, by caging bolt
In 132 the second limit holes 150 of insertion, the fixation position of fixed limit plate 14；Then according to reserved steel bar 20 in precast wall body 2
Position makes the 12 face reserved steel bar 20 of sleeve in crossbeam 11, by caging bolt 132 by 13 moving beam 11 of the first guide rail
It is inserted into the first limit hole 130, the position of fixed cross beam 11；Then, by the lug plate holes 106 of 16 one end of extension section and otic placode 104
The snap-gauge 160 for being located at 16 other end of extension section is stuck in the two sides of 2 lower end of precast wall body, is then turned on power tightening part by connection
17, so that extension section 16 generates tightening force, reserved steel bar 20 enters in sleeve 12 through introduction part 120, completes reserved steel bar 20
Correction.
The application construction method of above-mentioned reserved steel bar means for correcting 1, comprising the following steps:
According to the sectional dimension of precast wall body 2, by adjusting limit plate 14 and the second guide rail 15 adjusting limit plate 14 and the
The link position of two outline borders 10210 is located at outline border 10 on precast wall body 2.
According to the position of the exposed reserved steel bar 20 of precast wall body 2, adjusted outside crossbeam 11 and first by the first guide rail 13
The link position of frame 100 makes 20 face sleeve 12 of reserved steel bar.
The lower end of precast wall body 2 is stuck in snap-gauge 160, extension section 16 is tensed, reserved steel bar 20 is made to pass through sleeve 12, it is complete
At the correction of reserved steel bar 20.
The application construction method of above-mentioned reserved steel bar means for correcting is easy to operate, is conducive to improve working efficiency, suitable for pushing away
Wide application.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (9)
1. a kind of reserved steel bar means for correcting (1) characterized by comprising
Outline border (10), the second outline border being arranged including the first outline border (100) for being arranged in the width direction and along its length
(102)；
Crossbeam (11), both ends are located on first outline border (100), and are in same plane with the outline border (10),
Sleeve (12), through the crossbeam (11), the central axis of the sleeve (12) is where the outline border (10)
Plane；
First guide rail (13), is opened in surface of first outline border (100) close to the crossbeam (11), and the crossbeam (11) is logical
First guide rail (13) is crossed to connect with first outline border (100) and slide along first outline border (100)；
Limit plate (14), perpendicular to the plane where the outline border (10)；
Second guide rail (15) is opened in surface of second outline border (102) close to the limit plate (14), the limit plate
(14) it is connect by second guide rail (15) with second outline border (102) and is slided along second outline border (102)；
At least two extension sections (16) are located on first outline border (100), described extension section (16) one end and described the
One outline border (100) connection, the other end are hung with snap-gauge (160)；
Power tightening part (17), the power tightening part (17) are set in the extension section (16), and the extension section is steel drawing
Lock, the power tightening part are motor and pulley.
2. reserved steel bar means for correcting (1) according to claim 1, which is characterized in that the end of the sleeve (12) is set
Have introduction part (120), the end of diameter from the sleeve (12) of the introduction part (120) becomes larger.
3. reserved steel bar means for correcting (1) according to claim 1, which is characterized in that the quantity of the sleeve (12) is
Multiple, multiple sleeves (12) are uniformly arranged in the crossbeam (11).
4. reserved steel bar means for correcting (1) according to claim 1, which is characterized in that first guide rail (13) is to open
Set on the groove of first outline border (100), the shape of the end of the shape and crossbeam (11) of first guide rail (13)
Match, the end of the crossbeam (11) is embedded in first guide rail (13) and slides along first guide rail (13).
5. reserved steel bar means for correcting (1) according to claim 4, which is characterized in that opened on first guide rail (13)
Equipped with multiple first limit holes (130), the distance and the width phase of the crossbeam (11) of adjacent first limit hole (130)
Deng.
6. reserved steel bar means for correcting (1) according to claim 1, which is characterized in that second guide rail (15) is to open
Set on the groove of second outline border (102), the shape of second guide rail (15) and the end shape of the limit plate (14)
Match, the end of the limit plate (14) is embedded in second guide rail (15) and slides along second guide rail (15).
7. reserved steel bar means for correcting (1) according to claim 6, which is characterized in that opened on second guide rail (15)
Equipped with multiple second limit holes (150).
8. reserved steel bar means for correcting (1) according to claim 1, which is characterized in that set on first outline border (100)
Have otic placode (104), the otic placode (104) offers lug plate holes (106), and the extension section (16) passes through the lug plate holes (106)
It is connect with the outline border (10).
9. a kind of application construction method of reserved steel bar means for correcting (1) described in claim 1, which is characterized in that including with
Lower step:
According to the sectional dimension of precast wall body (2), adjusted outside the limit plate (14) and described second by the second guide rail (15)
The link position of frame (102) is located at the outline border (10) on the precast wall body (2)；
According to the position of the exposed reserved steel bar (20) of the precast wall body (2), institute is adjusted by first guide rail (13)
The link position for stating crossbeam (11) Yu first outline border (100) makes sleeve (12) described in the reserved steel bar (20) face；
The lower end of the precast wall body (2) is stuck in the snap-gauge (160), using described in the power tightening part (17) tension
Extension section (16), the extension section are steel zipper, and the power tightening part is motor and pulley, and the reserved steel bar is made to pass through institute
Sleeve (12) are stated, the correction of the reserved steel bar (20) is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710609461.2A CN107363194B (en) | 2017-07-25 | 2017-07-25 | Reserved steel bar means for correcting and its application construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710609461.2A CN107363194B (en) | 2017-07-25 | 2017-07-25 | Reserved steel bar means for correcting and its application construction method |
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| CN107363194A CN107363194A (en) | 2017-11-21 |
| CN107363194B true CN107363194B (en) | 2019-09-27 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107952912A (en) * | 2018-01-15 | 2018-04-24 | 中建三局集团有限公司 | A kind of embedded bar machine straightening device and its application method |
| CN109322403A (en) * | 2018-11-28 | 2019-02-12 | 中建四局第三建筑工程有限公司 | A kind of concrete reserved steel bar adjustment device and method |
| CN113137010A (en) * | 2021-04-30 | 2021-07-20 | 北京住总第三开发建设有限公司 | Assembly type structural steel bar positioner and positioning method thereof |
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| CN106836820A (en) * | 2017-04-01 | 2017-06-13 | 中国水利水电第八工程局有限公司 | The means for correcting of the longitudinally connected reinforcing bar of precast shear wall and bearing calibration |
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| CN203640169U (en) * | 2013-12-12 | 2014-06-11 | 深圳市鹏城建筑集团有限公司 | Tool for rectifying reserved steel bars of vertical prefabricated part |
| CN205369939U (en) * | 2015-12-25 | 2016-07-06 | 中民筑友有限公司 | Bar reinforcement positioning device |
| CN205444945U (en) * | 2015-12-25 | 2016-08-10 | 中民筑友有限公司 | Bar reinforcement positioning device |
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| CN107363194A (en) | 2017-11-21 |
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