CN108505731A - The hand-held vibration mechanical float of suspension type - Google Patents
The hand-held vibration mechanical float of suspension type Download PDFInfo
- Publication number
- CN108505731A CN108505731A CN201810364483.1A CN201810364483A CN108505731A CN 108505731 A CN108505731 A CN 108505731A CN 201810364483 A CN201810364483 A CN 201810364483A CN 108505731 A CN108505731 A CN 108505731A
- Authority
- CN
- China
- Prior art keywords
- hand
- held vibration
- plastering
- hanger
- dither
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000725 suspension Substances 0.000 title claims abstract description 18
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 230000003137 locomotive effect Effects 0.000 claims description 4
- 240000007594 Oryza sativa Species 0.000 claims 1
- 235000007164 Oryza sativa Nutrition 0.000 claims 1
- 238000007599 discharging Methods 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 235000009566 rice Nutrition 0.000 claims 1
- 238000010276 construction Methods 0.000 description 13
- 239000004570 mortar (masonry) Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 239000011083 cement mortar Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 239000011505 plaster Substances 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/02—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
- E04F21/06—Implements for applying plaster, insulating material, or the like
- E04F21/08—Mechanical implements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/02—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
- E04F21/16—Implements for after-treatment of plaster or the like before it has hardened or dried, e.g. smoothing-tools, profile trowels
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The hand-held vibration mechanical float of suspension type disclosed by the invention, is related to a kind of building plastering mechanical, by hand-held vibration plastering device, hoist cable, hanger, electrical hoist composition.Hand-held vibration plastering device is connected by hoist cable with hanger, electrical hoist.Body is equipped with the hand-held vibration plastering device of dither, manipulation handle, controller, is only connected with hanger by hoist cable, hangs on the lower part of hanger arm one end.Constructor is by the manipulation handle equipped with controller, and operating hand-held vibration plastering device, back and forth movement is constructed from the bottom to top.By pedestal, column, the hanger that arm is constituted is equipped with electrical hoist, and arm can rotate in the horizontal direction.The present invention has the characteristics that simple in structure, operation is flexible, highly practical.
Description
Technical field
The present invention relates to a kind of building machineries, and in particular to a kind of hand-held vibration mechanical float of suspension type.
Background technology
Existing mechanical float is broadly divided into two types of reciprocation type and compression.The design concept of reciprocation type mechanical float：Plastering
Device close to construction wall, by mechanical energy, construct by the back and forth movement on rigid support；The thickness and flatness of coat of plaster take
Certainly in the verticality of holder and the distance between with wall, the stability of holder is additionally depended on.The each movement of holder need to adjust again
The stability of the distance between whole verticality, adjustment and wall, reinforced liner, it is cumbersome to take.In order to save working hour just in construction
Holder movement number is reduced accordingly, and single plastering is thicker, and pursuit once survives.There are mistaken ideas for the design concept, have ignored
Most basic element --- have contractile feature in cement mortar hardening process.Conventional cement mortar be solid, liquid simultaneously
Inhomogeneous charge object containing a small amount of gas is in semifluid shape.Cement mortar hardening process will appear chemical shrinkage, drying subtract
Contracting, self-constriction, temperature decrement, plasticity decrement, shrinking percentage is 2% or so, therefore《Plastering technique specification》Clear stipulaties are plastered
The method construction that construction should take layering, successively be delayed.Easily there is shrinkage cracking, hollowing in metope of the reciprocation type plastering machine after
Equal common quality defects.The design concept of compression mechanical float：Mortar is forced through pipeline to construction surface through the pump housing, passes through compression
Air or other mechanical systems carry out plastering construction.Mortar segregation loses flowability and blocks feed pipe for mortar in order to prevent in construction, needs
Change the physicochemical property of existing mortar by adding a variety of additives, the addition of additive increases construction material cost.This two
The drawbacks such as type mechanical float generally existing is complicated, cost is high, is not easy to manipulate.Hand-held vibration mechanical float has structure letter
Single, cheap, the flexible application prospect of operation, but because the weight of body and mortar fully relies on manpower in the construction process for it
Manipulation increases labor intensity while improving construction efficiency, this becomes hand-held vibration mechanical float and obtains specific practical application
Maximum technical bottleneck.
Invention content
To solve the above-mentioned problems, present invention aims at a kind of hand-held vibration mechanical float of suspension type is provided, there is structure
Simply, feature economic and practical, operation is flexible.
To achieve the goals above, the technical solution adopted in the present invention is as follows：The hand-held vibration mechanical float of suspension type is by hand
Hold vibration plastering device, hoist cable, hanger, electrical hoist composition；Hand-held vibration plastering device passes through hoist cable and hanger, electrical hoist
It is connected；
The body of hand-held vibration plastering device is equipped with dither, manipulates handle, controller；Dither is using intermittent
Working method, hand-held vibration plastering device open dither when being moved upwards close to metope, and hand-held vibration plastering device is transported downwards
Dither is closed when dynamic and stopping；Hand-held vibration plastering device is only connected by hoist cable with hanger, and hanger arm one is hung on
The lower part at end；The manipulation handle that constructor is equipped with by hand-held vibration plastering device body operates hand-held vibration plastering device under
Supreme back and forth movement is constructed；Constructor controls dither by the controller that hand-held vibration plastering device body is equipped with
Push And Release, control the positive and negative rotation and stopping of electrical hoist；
Hanger is by pedestal, column, arm composition；Pedestal is equipped with shifting roller and column, and column is connected with arm；Arm is with vertical
Column is axle center, can be rotated in the horizontal direction；
Electrical hoist is arranged on hanger.
Described in above-mentioned technical proposal, by least two cross section differences, the standpipe being plugged in together forms the column of hanger；
The small inner tube in cross section is drawn high by longitudinal, adjusts the height of column and arm.
Described in above-mentioned technical proposal, electrical hoist has speed-regulating function.
Described in above-mentioned technical proposal, vibration plastering device is held by hopper, plastering plate, discharge port adjustable plate, directive wheel, high frequency
Vibrator manipulates handle, controller, mounting point composition；Hopper front apron lower end is connected with the plastering plate equipped with discharge port, hopper
Bottom surface is that inclined surface is connected with discharge port bottom edge, and the angle α that hopper ramped bottom surface is formed with plastering back is obtuse angle；In hopper
Equipped with the discharge port adjustable plate for capableing of longitudinally adjusted fixed position, discharge port adjustable plate is equipped with longitudinal logical heart slot hole, by positioning
Screw is fixed on hopper front back；Hopper top is equipped with the directive wheel being connected with ash bucket by adjusting rod, is adjusted by changing
It is capable of the position of transverse shifting adjustment directive wheel in fixed position of the pole on ash bucket；On the body at the hand-held vibration plastering device back side
Equipped with dither；Handle is manipulated there are two being set on body outside hopper；It manipulates handle and is equipped with dither and electricity
The controller of dynamic hoist engine；Hopper top is equipped with the mounting point being connected with hoist cable.
Described in above-mentioned technical proposal, the side of 90 degree of folding, side width are not less than 5 millimeters after plastering plate edge is equipped with.
Described in above-mentioned technical proposal, the width A of plastering plate discharge port both sides is not less than 10 millimeters, discharge port bottom edge and plastering
The distance between board bottom side B is not less than 20 millimeters, and the width C of discharge port is not more than hopper inner width.
Described in above-mentioned technical proposal, dither and electronic elevator are respectively equipped on the lateral position of two manipulation handles
The controller of machine.
Described in above-mentioned technical proposal, hopper front apron central upper portion position is equipped with the mounting point being connected with hoist cable.
Described in above-mentioned technical proposal, the high-speed electric expreess locomotive of dither has speed-regulating function；The vibration frequency of dither
Rate can adjust in the range of 80 to 300 hertz；The non-loaded amplitude of dither is less than 2 millimeters.
Described in above-mentioned technical proposal, holds plank of the vibration plastering device using thickness no more than 2 millimeters and manufacture.
Above-mentioned technical proposal is taken, the invention has the advantages that：Hand-held vibration plastering device only by hoist cable with hang
Frame is connected, and connection type flexible utmostly reduces the vibration damping of dither, and constructing operation is made to be more flexible；It applies
What work person was constructed by being respectively equipped with two hand-held vibration plastering devices of manipulation handle operation of controller on lateral position
Design, meets human engineering mechanics, embodies good man-computer cooperation, and constructing operation is more intuitive and accurate；Dither
Using service intermittent mode, the heat dissipation for being conducive to high-speed electric expreess locomotive extends the working life of dither.Not according to consistency of mortar
It is adjusted within the scope of 80 to 300 hertz, selecting suitable vibration frequency to make mortar, liquefaction excludes inside rapidly in a short time
Gas increases the mobility of mortar and the caking property with metope；It is used for by the fixed position of longitudinally adjusted discharge port adjustable plate
Go out ash quantity in the control unit interval, changes the construction between plastering plate and metope in conjunction with the fixed position for laterally adjusting directive wheel
Angle, for controlling depth of plastering；The side that plastering plate edge is equipped with is to reinforce the plate face intensity of plastering plate, be conducive to inner corner trim
Longitudinal plastering construction；The setting of plastering board size increases plastering pressure and reduces the grey generation of landing；The position of mounting point is set
It is fixed, keep hand-held vibration plastering device with good stability in hanging work progress；Using the plank manufacture no more than 2 millimeters
Hand-held vibration plastering device reduces manufacturing cost and reduces high-frequency vibration damping.
Suitable electrical hoist rotating speed is selected according to consistency of mortar and coat of plaster thickness requirement difference, for controlling hand-held vibration
The speed of plastering device uplink construction.Hanger equipped with shifting roller, lifting column, rotary suspension arm makes the present invention have construction model
Enclose big, mobile flexible feature.
Description of the drawings
Fig. 1 is the structural plan schematic diagram of the hand-held vibration mechanical float of suspension type.
Fig. 2 is the front view of hand-held vibration plastering device.
Fig. 3 is the left view sectional view of hand-held vibration plastering device.
Fig. 4 is the vertical view of hand-held vibration plastering device.
The plastering plate size indication definition graph of the hand-held vibration plastering devices of Fig. 5.
Symbolic indication is in figure：1 is hand-held vibration plastering device；2 be hoist cable；3 be arm；4 be column inner tube；5 be column；
6 be pedestal；7 be shifting roller；8 be electrical hoist；
101 be hopper front apron；102 be plastering plate；103 be discharge port；104 be discharge port adjustable plate；105 be set screw；
106 be longitudinal logical heart vast sky；107 be mounting point；108 be directive wheel；109 be adjusting rod；110 be manipulation handle；111 be high frequency
The controller of vibrator；112 be the controller of electrical hoist；113 be dither；114 be side；
A indicates the width of discharge port both sides；B indicates the distance between discharge port bottom edge and plastering plate bottom edge；C indicates discharge port
Width；
Indicate directive wheel adjustment direction；Indicate discharge port adjustable plate adjustment direction.
Specific implementation mode
Below in conjunction with the accompanying drawings 1 and example be described in further detail：Hanger is made of pedestal 6, column 5, arm 3, and pedestal 6 is equipped with
Shifting roller 7 and column 5, column 5 are connected with arm 3.Arm 3 is axle center with column 5, can rotated in the horizontal direction.It hangs
The column 5 of frame is made of the standpipe that at least two cross section differences are plugged in together.The small inner tube in cross section is drawn high by longitudinal
4, adjust the height of column 5 and arm 3.Holding vibration plastering device 1 has tune by hoist cable 2 and hanger and on hanger
The electrical hoist 8 of fast function is connected.
It is described in further detail in conjunction with attached drawing 2, attached drawing 3, attached drawing 4 and example：101 lower end of hopper front apron be equipped with discharge port
103 plastering plate 102 is connected, and hopper bottom is that inclined surface is connected with 103 bottom edge of discharge port, ramped bottom surface and plastering back shape
At angle α be obtuse angle；The discharge port adjustable plate 104 for capableing of longitudinally adjusted fixed position, discharge port adjustable plate are equipped in hopper
104 are equipped with longitudinal logical heart slot hole 106, and 101 back side of hopper front apron is fixed on by set screw 105；Hopper top is equipped with logical
The directive wheel 108 that toning pole 109 is connected with ash bucket, directive wheel 108 can transverse shifting adjust its fixed position；Hand-held vibration
The body at 101 back side of plastering device is equipped with dither 113；Handle 110 is manipulated there are two being set on body outside hopper；Two
It is respectively equipped with the controller 111 of dither and the controller of electrical hoist on the lateral position of a manipulation handle 110
112；101 central upper portion position of hopper front apron is equipped with the mounting point 107 being connected with hoist cable.102 edge of plastering plate is rolled over after being equipped with
90 degree of side 114,114 width of side are not less than 5 millimeters.Discharge port adjustable plate 104 according toDirection adjusts its fixed position.
Directive wheel 108 according toDirection adjusts its fixed position.
There is the high-speed electric expreess locomotive of dither 113 speed-regulating function, vibration frequency to be adjusted within the scope of 80 to 300 hertz.According to
Consistency of mortar difference selects suitable vibration frequency, and preferably vibration frequency is 150 hertz.
Plank of the hand-held vibration plastering device 1 using thickness no more than 2 millimeters manufactures, preferably 0.5 millimeter of endurance spring steel plate system
It makes.
It is described in further detail in conjunction with attached drawing 5 and example：The width A of 103 both sides of discharge port of plastering plate is excellent not less than 10 millimeters
Select 30 millimeters；The distance between discharge port bottom edge and plastering plate bottom edge B are not less than 20 millimeters, preferably 50 millimeters；The width of discharge port
It spends C and is not more than hopper inner width.
The operate with method of the present invention：Hopper filler --- constructor's both hands manipulate handle, hold the guiding of plastering device
Wheel and plastering plate bottom edge reach pre- close to metope --- opening dither, the hand-held plastering device that vibrates moves from the bottom to top ---
The fixed hand-held vibration plastering device downlink of plastering height --- closing dither ---, completes a float work program.
Claims (10)
1. the hand-held vibration mechanical float of suspension type vibrates plastering device by holding, hoist cable, hanger, electrical hoist is constituted, and feature exists
In：Hand-held vibration plastering device is connected by hoist cable and hanger, electrical hoist；
The body of the hand-held vibration plastering device is equipped with dither, manipulates handle, controller；Dither uses
Service intermittent mode, hand-held vibration plastering device open dither when being moved upwards close to metope, hold vibration plastering device
It moves downward and closes dither when stopping；Hand-held vibration plastering device is only connected by hoist cable with hanger, and hanger is hung on
The lower part of arm one end；The manipulation handle that constructor is equipped with by hand-held vibration plastering device body operates hand-held vibration plastering
Device from the bottom to top construct by back and forth movement；Constructor controls high frequency by the controller that hand-held vibration plastering device body is equipped with
The Push And Release of vibrator controls the positive and negative rotation and stopping of electrical hoist；
The hanger is by pedestal, column, arm composition；Hanger pedestal is equipped with shifting roller and column, column and arm phase
Even；Arm can rotate in the horizontal direction using column as axle center；
The electrical hoist is arranged on hanger.
2. the hand-held vibration mechanical float of suspension type according to claim 1, it is characterised in that：The column of hanger is by least two
Cross section is different, the standpipe composition being plugged in together；The small inner tube in cross section is drawn high by longitudinal, adjusts the height of column and arm
Degree.
3. the hand-held vibration mechanical float of suspension type according to claim 1, it is characterised in that：Electrical hoist has speed governing work(
Energy.
4. the hand-held vibration mechanical float of suspension type according to claim 1, it is characterised in that：Hand-held vibration plastering device is by expecting
Bucket, plastering plate, discharge port adjustable plate, directive wheel, dither manipulate handle, controller, mounting point composition；Hopper front
Plate lower end is connected with equipped with the plastering plate of discharge port, and hopper bottom is connected for inclined surface with discharge port bottom edge, ramped bottom surface with smear
The angle (α) that grey back is formed is obtuse angle；The discharge port adjustable plate for capableing of longitudinally adjusted fixed position, discharging are equipped in hopper
Mouth adjustable plate is equipped with longitudinal logical heart slot hole, and hopper front back is fixed on by set screw；Hopper top, which is equipped with, passes through tune
The directive wheel that pole is connected with ash bucket, being capable of transverse shifting adjustment directive wheel by changing fixed position of the adjusting rod on ash bucket
Position；The body at the hand-held vibration plastering device back side is equipped with dither；Manipulation there are two being set on body outside hopper
Handle；Manipulate the controller that handle is equipped with dither and electrical hoist；Hopper top is equipped with the extension being connected with hoist cable
Contact.
5. the hand-held vibration mechanical float of suspension type according to claim 1 or claim 4, it is characterised in that：Plastering plate
The side of 90 degree of folding, side width are not less than 5 millimeters after edge is equipped with.
6. the hand-held vibration mechanical float of suspension type according to claim 1 or claim 4, it is characterised in that：Plastering plate goes out
The width (A) of material mouth both sides is not less than 10 millimeters, and the distance between discharge port bottom edge and plastering plate bottom edge (B) is not less than 20 millis
Rice, discharge port width (C) are not more than hopper inner width.
7. the hand-held vibration mechanical float of suspension type according to claim 1 or claim 4, it is characterised in that：Two manipulations
The controller of dither and electrical hoist is respectively equipped on the lateral position of handle.
8. the hand-held vibration mechanical float of suspension type according to claim 1 or claim 4, it is characterised in that：Hopper front
Plate central upper portion position is equipped with the mounting point being connected with hoist cable.
9. the hand-held vibration mechanical float of suspension type according to claim 1 or claim 4, it is characterised in that：High-frequency vibration
The high-speed electric expreess locomotive of device has speed-regulating function；The vibration frequency of dither can adjust in the range of 80 to 300 hertz；It is high
The non-loaded amplitude of frequency vibration device is less than 2 millimeters.
10. the hand-held vibration mechanical float of suspension type according to claim 1 or claim 4, it is characterised in that：Hand-held vibration
Plank of the plastering device using thickness no more than 2 millimeters manufactures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810364483.1A CN108505731A (en) | 2018-04-16 | 2018-04-16 | The hand-held vibration mechanical float of suspension type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810364483.1A CN108505731A (en) | 2018-04-16 | 2018-04-16 | The hand-held vibration mechanical float of suspension type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108505731A true CN108505731A (en) | 2018-09-07 |
Family
ID=63382867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810364483.1A Pending CN108505731A (en) | 2018-04-16 | 2018-04-16 | The hand-held vibration mechanical float of suspension type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108505731A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111169685A (en) * | 2020-02-24 | 2020-05-19 | 佛山市中医院 | Automatic suction nozzle loading device |
| CN112031343A (en) * | 2020-08-17 | 2020-12-04 | 浙江工固建筑机械有限公司 | Plastering vibrating device |
| CN113404262A (en) * | 2021-06-23 | 2021-09-17 | 深圳班翟机器人有限公司 | Plastering process |
| CN114411739A (en) * | 2022-01-26 | 2022-04-29 | 湖北信德建设集团有限公司 | Automatic forming device and method for foundation pit external corner arc-shaped structure |
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|---|---|---|---|---|
| CN2136290Y (en) * | 1992-09-04 | 1993-06-16 | 谢鸿琴 | Wall plastering machine |
| US5578327A (en) * | 1993-08-16 | 1996-11-26 | Tan; Tah H. | Plastering machine |
| CN2597603Y (en) * | 2002-12-18 | 2004-01-07 | 杨宝堂 | Hanging beating type plastering machine |
| CN201347615Y (en) * | 2008-12-31 | 2009-11-18 | 淮滨县新宇机械加工有限公司 | Mini plastering machine |
| US20100230441A1 (en) * | 2006-10-16 | 2010-09-16 | Johnson Michael W | Entrance chute for blowing insulation machine |
| CN207110387U (en) * | 2017-07-06 | 2018-03-16 | 吴奉军 | Gravitational equilibrium mechanical float |
| CN208168279U (en) * | 2018-04-16 | 2018-11-30 | 吴奉军 | The hand-held vibration mechanical float of suspension type |
-
2018
- 2018-04-16 CN CN201810364483.1A patent/CN108505731A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2136290Y (en) * | 1992-09-04 | 1993-06-16 | 谢鸿琴 | Wall plastering machine |
| US5578327A (en) * | 1993-08-16 | 1996-11-26 | Tan; Tah H. | Plastering machine |
| CN2597603Y (en) * | 2002-12-18 | 2004-01-07 | 杨宝堂 | Hanging beating type plastering machine |
| US20100230441A1 (en) * | 2006-10-16 | 2010-09-16 | Johnson Michael W | Entrance chute for blowing insulation machine |
| CN201347615Y (en) * | 2008-12-31 | 2009-11-18 | 淮滨县新宇机械加工有限公司 | Mini plastering machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111169685A (en) * | 2020-02-24 | 2020-05-19 | 佛山市中医院 | Automatic suction nozzle loading device |
| CN112031343A (en) * | 2020-08-17 | 2020-12-04 | 浙江工固建筑机械有限公司 | Plastering vibrating device |
| CN113404262A (en) * | 2021-06-23 | 2021-09-17 | 深圳班翟机器人有限公司 | Plastering process |
| CN114411739A (en) * | 2022-01-26 | 2022-04-29 | 湖北信德建设集团有限公司 | Automatic forming device and method for foundation pit external corner arc-shaped structure |
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