CN113062524A - Floor thickness accurate control construction process and controller - Google Patents
Floor thickness accurate control construction process and controller Download PDFInfo
- Publication number
- CN113062524A CN113062524A CN202110347644.8A CN202110347644A CN113062524A CN 113062524 A CN113062524 A CN 113062524A CN 202110347644 A CN202110347644 A CN 202110347644A CN 113062524 A CN113062524 A CN 113062524A
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- controller
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Floor Finish (AREA)
Abstract
The invention relates to the technical field of building construction, and discloses a construction process and a controller for accurately controlling the thickness of a floor slab. This accurate control construction technology of floor thickness and controller, the controller can carry out corresponding altitude mixture control according to the construction floor of different thickness to efficiency when having improved the floor construction has ensured the speed of floor construction, has improved the practicality and the use value of this controller.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a floor thickness accurate control construction process and a controller.
Background
The floor thickness controller is a tool frequently used in the house concrete pouring construction process, double-layer reinforcing steel bar nets are designed in concrete pouring floors, a certain distance above the upper layer reinforcing steel bar net is the upper end face of a floor, a certain distance above the lower layer reinforcing steel bar net is a template, the existing template mostly adopts a wood template, the distance from the top face of the wood template to the upper end face of the floor is the thickness of the floor, the existing construction method is to add a floor thickness controller or a split heads made of cement between the upper layer reinforcing steel bar net and the lower layer reinforcing steel bar net, then, concrete is poured on the wood template until the upper layer reinforcing steel bar is not covered.
The required floor thickness of floor of present different patterns is also different, but the thickness of the floor controller of present majority is all fixed throughout, has caused the controller of a height to use on the floor of a pattern like this to reduced the practicality of controller, when there is not corresponding controller in floor construction, just need change corresponding controller and just can continue the construction, had so seriously influenced the efficiency when constructing the floor, reduced the speed of floor construction.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a floor thickness accurate control construction process and a controller, which have the advantages of carrying out corresponding adjustment according to the thicknesses required by different floor constructions and the like, and solve the problem that the thickness of the floor controller is always fixed.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an accurate control construction controller of floor thickness, including the bearing base, the last fixed surface of bearing base is connected with the backup pad, the upper end fixedly connected with seal ring of backup pad, the piece is placed to the last fixed surface of bearing base is connected with down the muscle, the right side that the piece is located the backup pad is placed to lower muscle, first mounting groove has been seted up on the seal ring, the upper and lower both sides surface that the seal ring was extended respectively to first mounting groove, the second mounting groove has been seted up to the inside of backup pad, the upper surface of backup pad is extended to the second mounting groove, the second mounting groove communicates with each other with first mounting groove, be provided with the regulation structure in the second mounting groove, the second mounting groove is inserted with first mounting groove and is equipped with the regulating plate, the last fixed surface of regulating plate.
Preferably, adjust the structure and include the control gear, the control gear sets up in the second mounting groove, the fixed connecting axle that has cup jointed on the control gear, the left end of connecting axle rotates to be connected on the left side inner wall of second mounting groove, the right-hand member of connecting axle runs through the right side surface of wearing out the backup pad, and the connecting axle rotates with the backup pad to be connected, it is connected with the regulating block to rotate on the right side surface of backup pad, the left side surface of regulating block and the right-hand member fixed connection of connecting axle, the movable groove has been seted up to the lower extreme of regulating plate, the left and right sides surface and the lower surface: the control gear on the connecting shaft can be controlled through the adjusting block, so that the control of the adjusting plate is facilitated.
Preferably, be provided with butt joint tooth on the rear side inner wall of activity groove, control gear sets up in the activity inslot, and control gear is connected with butt joint tooth meshing, beneficial effect: the control gear can drive the adjusting plate to move upwards or downwards in the rotating process, so that the height of the floor slab placing platform is adjusted.
Preferably, spacing spout has been seted up respectively to both sides surface around the regulating plate, and two spacing spouts all are located the second mounting groove, are provided with the restriction pulley respectively on the both sides inner wall around the second mounting groove, and the regulating plate passes through spacing spout and restriction pulley sliding connection, beneficial effect: spacing spout can play the effect that blocks to the restriction pulley to make the regulating plate have the extreme position of upper and lower height, prevented to appear the condition of separation on regulating plate and the seal ring, ensured the device stability when using, the restriction pulley has also reduced the frictional force that the regulating plate formed when sliding from top to bottom simultaneously, thereby fluency when having ensured the regulating plate and adjusting has avoided the dead condition of mechanical card, further reduced the working strength when constructor adjusts.
Preferably, the thread groove has been seted up on the regulating block, and the thread groove extends the left and right sides surface of regulating block respectively, and the thread groove has equally been seted up on the right side surface of backup pad, and the thread groove in the backup pad is in same horizontal position with the thread groove on the regulating block, and thread groove female connection has bolt, beneficial effect: when being connected the bolt with the thread groove on the regulating block and the thread groove in the backup pad respectively, the bolt forms fixed effect to the regulating block, has prevented that the condition of rotation from appearing in the regulating block.
A floor thickness accurate control construction process comprises the following specific operation steps:
s1, after a floor slab template is supported, the plate bars are arranged from the position which is far away from the spacing between the beam main bars 1/2, corresponding controllers are required to be placed on the floor slab before the plate bars are bound, and the lower iron steel bars (short-direction steel bars are laid firstly) are laid on the template surface according to the steel bar spacing required by the design of a drawing, are bound on the lower bar placing blocks of the controllers, and are fully bound by adopting splayed buckles during binding, so that the steel bars are prevented from shifting;
s2, after the lower steel bars are bound, matching the water-transfer electric pipelines, and binding the upper iron steel bars after the binding is finished;
s3, binding the upper bars on an upper bar placing block of the controller, and pulling small white lines to straighten the bars during binding so as to ensure that the intervals between the upper net bars and the lower net bars are consistent;
s4, during binding, a lower port of the controller is required to be placed above the upper iron steel bars of the lower net of the plate, a placing platform of the controller is positioned below the lower iron steel bars of the upper net of the plate, a lower bar placing block and an upper bar placing block of the controller are respectively firmly bound with the upper and lower steel bars of the plate, the controller is prevented from running and directly supported on a bottom template of the plate, the steel bars bound in the upper bar placing block of the controller are required to be parallel to the steel bars bound by the lower bar placing block, and the appearance is kept;
s5, uniformly arranging the lower iron binding wires of the plate reinforcement net piece upwards, uniformly arranging the upper iron binding wires downwards, and arranging no less than three lap joint binding buckles at the lap joint of the steel bars;
s6, binding is not less than three buttons when the intersection point of the plate rib and the beam rib and the main beam rib is more than three points;
s7, all the stress bar intersections are bound by eight-shaped buckles, the number of the broken buckles and loose buckles of the bound bars is not more than 10% of the number of the bound buckles, and the broken buckles and loose buckles are not concentrated;
the distance between S8 and the controller must not exceed 1000m, and the arrangement of the reinforcement protective layer cushion block distance is 1000mm quincunx, and the beneficial effect is that: the pouring precision is greatly improved, the cost waste caused by excessive pouring can be avoided, or the thickness of the floor slab is insufficient caused by insufficient pouring amount, and the integral forming process is stable, easy to process, high in strength, wide in application and low in cost.
The principle of the technical scheme is as follows: rotate the regulating block, the regulating block can be controlled the epaxial control gear of connecting, thereby the control gear carries out corotation or reversal, because the butt joint tooth meshing of control gear and activity inslot, so the control gear can drive the regulating plate upwards or displacement downwards at the pivoted in-process, thereby reach the regulation to floor place the platform height, adjust when the height that corresponds when floor place the platform, install the bolt in the thread groove, thereby the bolt forms fixed effect to the regulating block, the condition of rotation has been prevented from appearing to the regulating block, the regulating plate keeps motionless like this.
The beneficial effects of this technical scheme lie in: the controller can carry out corresponding altitude mixture control according to the construction floor of different thickness to efficiency when having improved the floor construction has ensured the speed of floor construction, has improved the practicality and the use value of this controller, and this controller is comparatively simple when to altitude mixture control simultaneously, only needs rotate just can highly adjust the controller to the regulating block, thereby has reduced constructor's the operation degree of difficulty, has ensured the efficiency when using the controller to construct.
(III) advantageous effects
Compared with the prior art, the invention provides a floor thickness accurate control construction process and a controller, and the floor thickness accurate control construction process and the controller have the following beneficial effects:
1. this accurate control construction technology of floor thickness and controller, the controller can carry out corresponding altitude mixture control according to the construction floor of different thickness, thereby efficiency when having improved the floor construction, the speed of floor construction has been ensured, the practicality and the use value of this controller have been improved, this controller is comparatively simple when to altitude mixture control simultaneously, only need rotate the regulating block and just can highly adjust the controller, thereby constructor's the operation degree of difficulty has been reduced, efficiency when having ensured the use controller construction.
2. This accurate control construction controller of floor thickness, spacing spout can play the effect that blocks to the restriction pulley to make the regulating plate have the extreme position of upper and lower height, prevented the condition that appears the separation on regulating plate and the seal ring.
3. This accurate control construction controller of floor thickness, restriction pulley have also reduced the frictional force that the regulating plate formed when sliding from top to bottom to smoothness nature when having ensured the regulating plate regulation has avoided the dead condition of mechanical card, the working strength when further having reduced constructor's regulation.
4. This accurate control construction controller of floor thickness when being connected the bolt respectively with the thread groove on the regulating block and the thread groove in the backup pad, the bolt forms fixed effect to the regulating block, has prevented that the condition of rotation from appearing in the regulating block.
5. According to the floor thickness accurate control construction process, the pouring precision is greatly improved, the cost waste caused by excessive pouring can be avoided, and the floor thickness is insufficient caused by insufficient pouring amount.
Drawings
FIG. 1 is a schematic structural view of a controller for precise control of floor thickness according to the present invention;
FIG. 2 is a schematic view of a disassembled structure between a supporting plate and an adjusting plate according to the present invention;
FIG. 3 is a right side view of the internal structure of a second mounting groove of the present invention;
fig. 4 is a cross-sectional view of the support plate of the present invention.
In the figure: 1 bearing base, 2 backup pads, 3 seal ring, 4 lower muscle place the piece, 5 regulating plates, 6 floor place the platform, 7 go up the muscle place the piece, 8 first mounting grooves, 9 second mounting grooves, 10 activity grooves, 11 butt joint teeth, 12 control gears, 13 regulating blocks, 14 connecting axles, 15 spacing spouts, 16 restriction pulleys, 17 thread groove, 18 bolts.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a new technical solution: the utility model provides an accurate control construction controller of floor thickness, is including bearing base 1, and bearing base 1's last fixed surface is connected with backup pad 2, and the upper end fixedly connected with seal ring 3 of backup pad 2, bearing base 1's last fixed surface is connected with down the muscle and places piece 4, and piece 4 is located backup pad 2's right side is placed to lower muscle, and contactless between the two.
The front side surface and the rear side surface of the adjusting plate 5 are respectively provided with a limiting sliding groove 15, the two limiting sliding grooves 15 are both positioned in the second mounting groove 9, the inner walls of the front side wall and the rear side wall of the second mounting groove 9 are respectively provided with a limiting pulley 16, the limiting pulleys 16 are not described in much detail for the prior structure, so that the adjusting plate 5 is in sliding connection with the limiting pulleys 16 through the limiting sliding grooves 15, when the adjusting plate 5 slides upwards or downwards, the limiting sliding grooves 15 can block the limiting pulleys 16, the adjusting plate 5 is enabled to have a limit position with an upper height and a lower height, the separation between the adjusting plate 5 and the water stop ring 3 is prevented, the stability of the device in use is ensured, meanwhile, the limiting pulleys 16 also reduce the friction force formed when the adjusting plate 5 slides upwards and downwards, the smoothness of the adjusting plate 5 is ensured, and the mechanical jamming condition is avoided, further reducing the work intensity of constructors during adjustment.
Seted up a plurality of thread groove 17 on the regulating block 13, and thread groove 17 extends the left and right sides surface of regulating block 13 respectively, thread groove 17 has been seted up equally to the right side surface of backup pad 2, and thread groove 17 on backup pad 2 and the thread groove 17 on the regulating block 13 are in same horizontal position, thread groove 17 female connection has bolt 18, bolt 18 is not being given redundant description for current structure, thereby when bolt 18 is connected with thread groove 17 on the regulating block 13 and the thread groove 17 on the backup pad 2 respectively, bolt 18 forms fixed effect to regulating block 13, the condition of rotation has been prevented from appearing in regulating block 13.
This scheme provides a floor thickness accurate control construction technology simultaneously, and concrete operating procedure is as follows:
s1, after a floor slab template is supported, the plate bars are arranged from the position which is far away from the spacing between the beam main bars 1/2, corresponding controllers are required to be placed on the floor slab before the plate bars are bound, and lower iron steel bars (short-direction steel bars are laid firstly) are laid on the template surface according to the steel bar spacing required by the design of a drawing, and are bound on a lower bar placing block 4 of the controller, and eight-shaped buckles are adopted for full binding during binding, so that the steel bars are prevented from shifting;
s2, after the lower steel bars are bound, matching the water-transfer electric pipelines, and binding the upper iron steel bars after the binding is finished;
s3, binding the upper bars on an upper bar placing block 7 of the controller, and pulling small white lines to straighten the bars during binding so as to ensure that the intervals between the upper net bars and the lower net bars are consistent;
s4, during binding, a lower port of the controller is required to be placed above the upper iron steel bars of the lower net of the plate, a placing platform of the controller is positioned below the lower iron steel bars of the upper net of the plate, a lower rib placing block 4 and an upper rib placing block 7 of the controller are respectively firmly bound with the upper and lower steel bars of the plate, the controller is prevented from running and directly supported on a bottom template of the plate, the steel bars bound in the upper rib placing block 7 of the controller are required to be parallel to the steel bars bound by the lower rib placing block 4, and the appearance is kept attractive;
s5, uniformly arranging the lower iron binding wires of the plate reinforcement net piece upwards, uniformly arranging the upper iron binding wires downwards, and arranging no less than three lap joint binding buckles at the lap joint of the steel bars;
s6, binding is not less than three buttons when the intersection point of the plate rib and the beam rib and the main beam rib is more than three points;
s7, all the stress bar intersections are bound by eight-shaped buckles, the number of the broken buckles and loose buckles of the bound bars is not more than 10% of the number of the bound buckles, and the broken buckles and loose buckles are not concentrated;
s8, the distance between the controllers is not more than 1000m, and the distance between the reinforcing plate protective layer cushion blocks is 1000mm arranged in a quincunx shape.
The working principle is as follows: when the adjustment is needed, the adjusting block 13 is rotated, the adjusting block 13 can control the control gear 12 on the connecting shaft 14, so that the control gear 12 rotates forwards or backwards, the control gear 12 is meshed with the butt teeth 11 in the movable groove 10, the adjusting plate 5 can be driven by the control gear 12 to move upwards or downwards in the rotating process, the height of the floor placing platform 6 is adjusted, when the floor placing platform 6 is adjusted to the corresponding height, the bolt 18 is installed in the threaded groove 17, the bolt 18 forms a fixing effect on the adjusting block 13, the condition that the adjusting block 13 rotates is prevented, and the adjusting plate 5 is kept still.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides an accurate control construction controller of floor thickness, includes bearing base (1), its characterized in that: the upper surface of the bearing base (1) is fixedly connected with a supporting plate (2), the upper end of the supporting plate (2) is fixedly connected with a water stop ring (3), the upper surface of the bearing base (1) is fixedly connected with a lower rib placing block (4), the lower rib placing block (4) is positioned on the right side of the supporting plate (2), the water stop ring (3) is provided with a first mounting groove (8), the first mounting groove (8) respectively extends out of the upper side surface and the lower side surface of the water stop ring (3), the supporting plate (2) is internally provided with a second mounting groove (9), the second mounting groove (9) extends out of the upper surface of the supporting plate (2), the second mounting groove (9) is communicated with the first mounting groove (8), an adjusting structure is arranged in the second mounting groove (9), an adjusting plate (5) is inserted into the second mounting groove (9) and the first mounting groove (8), the upper surface of the adjusting plate (5, the right side surface of the adjusting plate (5) is fixedly connected with an upper rib placing block (7).
2. The accurate construction control ware of floor thickness of claim 1, characterized in that: the adjusting structure comprises a control gear (12), the control gear (12) is arranged in a second mounting groove (9), a connecting shaft (14) is fixedly sleeved on the control gear (12), the left end of the connecting shaft (14) is rotatably connected to the inner wall of the left side of the second mounting groove (9), a movable groove (10) is formed in the lower end of the adjusting plate (5), and the movable groove (10) extends out of the left side surface and the right side surface of the adjusting plate (5) respectively.
3. The accurate construction control ware of floor thickness of claim 2, characterized in that: the right end of the connecting shaft (14) penetrates through the right side surface of the supporting plate (2), the connecting shaft (14) is rotatably connected with the supporting plate (2), the right side surface of the supporting plate (2) is rotatably connected with an adjusting block (13), and the left side surface of the adjusting block (13) is fixedly connected with the right end of the connecting shaft (14).
4. The controller of claim 3, wherein the controller is configured to control the thickness of the floor slab accurately: the rear inner wall of the movable groove (10) is provided with butt teeth (11), the control gear (12) is arranged in the movable groove (10), and the control gear (12) is meshed with the butt teeth (11).
5. The controller of claim 4, wherein the controller is configured to control the thickness of the floor slab accurately, and comprises: spacing spout (15) have been seted up respectively to the front and back both sides surface of regulating plate (5), and two spacing spouts (15) all are located second mounting groove (9), are provided with restriction pulley (16) on the front and back both sides inner wall of second mounting groove (9) respectively, and regulating plate (5) are through spacing spout (15) and restriction pulley (16) sliding connection.
6. The controller of claim 5, wherein the controller is configured to control the thickness of the floor slab accurately: the adjusting block (13) is provided with a thread groove (17), the thread groove (17) extends out of the left side surface and the right side surface of the adjusting block (13), and the right side surface of the supporting plate (2) is also provided with the thread groove (17).
7. The controller of claim 6, wherein: the thread groove (17) on the supporting plate (2) and the thread groove (17) on the adjusting block (13) are located at the same horizontal position, and a bolt (18) is connected to the inner thread of the thread groove (17).
8. A floor thickness accurate control construction process comprises the following steps:
s1, after a floor slab template is supported, the plate bars are laid from a position which is half of the distance between the plate bars and a main beam bar, before the plate bars are bound, a corresponding controller needs to be placed on the floor slab, and the steel bar space of the template surface according to the design requirement of a drawing is subjected to line snapping and laying of lower iron steel bars, the lower iron steel bars are bound on a lower bar placing block (4) of the controller, and binding is fully carried out by adopting splayed buckles during binding, so that the steel bars are prevented from being out of position;
s2, after the lower steel bars are bound, matching the water-transfer electric pipelines, and binding the upper iron steel bars after the binding is finished;
s3, binding the upper bars on an upper bar placing block (7) of the controller, and pulling small white lines to straighten the bars during binding so as to ensure that the intervals between the upper net bars and the lower net bars are consistent;
s4, during binding, a lower port of the controller is required to be placed above an upper iron reinforcement of a lower net of the plate, a placing platform of the controller is positioned below the lower iron reinforcement of the upper net of the plate, a lower reinforcement placing block (4) and an upper reinforcement placing block (7) of the controller are respectively firmly bound with the upper reinforcement and the lower reinforcement of the plate, the controller is prevented from running and directly supported on a bottom template of the plate, and the reinforcement bound in the upper reinforcement placing block (7) of the controller needs to be parallel to the reinforcement bound by the lower reinforcement placing block (4), so that the appearance is kept attractive;
s5, uniformly arranging the lower iron binding wires of the plate reinforcement net piece upwards, uniformly arranging the upper iron binding wires downwards, and arranging no less than three lap joint binding buckles at the lap joint of the steel bars;
s6, binding is not less than three buttons when the intersection point of the plate rib and the beam rib and the main beam rib is more than three points;
s7, all the stress bar intersections are bound by eight-shaped buckles, the number of the broken buckles and loose buckles of the bound bars is not more than 10% of the number of the bound buckles, and the broken buckles and loose buckles are not concentrated;
s8, the distance between the controllers is not more than 1000m, and the distance between the reinforcing plate protective layer cushion blocks is 1000mm arranged in a quincunx shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110347644.8A CN113062524A (en) | 2021-03-31 | 2021-03-31 | Floor thickness accurate control construction process and controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110347644.8A CN113062524A (en) | 2021-03-31 | 2021-03-31 | Floor thickness accurate control construction process and controller |
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| Publication Number | Publication Date |
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| CN113062524A true CN113062524A (en) | 2021-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110347644.8A Pending CN113062524A (en) | 2021-03-31 | 2021-03-31 | Floor thickness accurate control construction process and controller |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208184072U (en) * | 2018-02-09 | 2018-12-04 | 中建五局第三建设有限公司 | Floor and reinforcing bar protective layer thickness control device |
| CN211396553U (en) * | 2019-11-21 | 2020-09-01 | 湖北万泉建设工程有限公司 | Regularization prefabricated staircase operation platform |
| CN111668750A (en) * | 2020-05-27 | 2020-09-15 | 国网河北省电力有限公司新河县供电分公司 | Electric power engineering support |
| CN111980259A (en) * | 2020-06-30 | 2020-11-24 | 中国一冶集团有限公司 | Thickness control device for cast-in-place concrete floor slab and steel bar protection layer |
| US20210087019A1 (en) * | 2017-12-06 | 2021-03-25 | Hiroshi Chida | Stair lift |
-
2021
- 2021-03-31 CN CN202110347644.8A patent/CN113062524A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210087019A1 (en) * | 2017-12-06 | 2021-03-25 | Hiroshi Chida | Stair lift |
| CN208184072U (en) * | 2018-02-09 | 2018-12-04 | 中建五局第三建设有限公司 | Floor and reinforcing bar protective layer thickness control device |
| CN211396553U (en) * | 2019-11-21 | 2020-09-01 | 湖北万泉建设工程有限公司 | Regularization prefabricated staircase operation platform |
| CN111668750A (en) * | 2020-05-27 | 2020-09-15 | 国网河北省电力有限公司新河县供电分公司 | Electric power engineering support |
| CN111980259A (en) * | 2020-06-30 | 2020-11-24 | 中国一冶集团有限公司 | Thickness control device for cast-in-place concrete floor slab and steel bar protection layer |
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| 李自奉: " http://ishare.iask.sina.com.cn/f/bsd8TZcZbdf.html ", 《360导航》 * |
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Application publication date: 20210702 |