CN109029397A - A kind of portable construction laser level - Google Patents
A kind of portable construction laser level Download PDFInfo
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- CN109029397A CN109029397A CN201810852047.9A CN201810852047A CN109029397A CN 109029397 A CN109029397 A CN 109029397A CN 201810852047 A CN201810852047 A CN 201810852047A CN 109029397 A CN109029397 A CN 109029397A
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- 238000010276 construction Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims abstract description 19
- 238000009434 installation Methods 0.000 claims abstract description 5
- 239000004593 Epoxy Substances 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 239000011701 zinc Substances 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims 1
- 229910052801 chlorine Inorganic materials 0.000 claims 1
- 239000000460 chlorine Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 239000011229 interlayer Substances 0.000 abstract description 6
- 238000002834 transmittance Methods 0.000 abstract description 4
- 230000009545 invasion Effects 0.000 abstract description 2
- 238000006467 substitution reaction Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 13
- 230000006872 improvement Effects 0.000 description 8
- 239000003550 marker Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920000965 Duroplast Polymers 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C15/002—Active optical surveying means
- G01C15/004—Reference lines, planes or sectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C15/002—Active optical surveying means
- G01C15/008—Active optical surveying means combined with inclination sensor
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The present invention discloses a kind of portable construction laser level, is sequentially equipped with gun sight, spirit level and switch from left to right on laser level ontology top；Laser lamp is set respectively on the oblique section Liang Ge of laser level ontology bottom end；Handle is set in the middle part of laser level ontology, also sets power supply unit in laser level body interior.The installation of this level is simple, it is convenient, fast, construction efficiency and construction precision can be greatly improved, be conducive to improve construction speed and construction quality, it reduces the investment of the manpower in ceiling hammer use process and reduces error of the control line in interlayer transmittance process, reduce the security risk on skyscraper in alien invasion throwing line process, it uses, it is easy to carry, it can reduce using ceiling hammer in even substitution work progress, the influence of natural conditions is not will receive using laser demarcation, furthermore, this level small volume, it is light-weight, and USB charge port is set, configurable high capacity cell, it is persistently longer using the time.
Description
Technical field
This level is related to a kind of laser level, relates particularly to a kind of portable construction laser demarcation
Instrument mainly applies to structure unwrapping wire process, belongs to construction product technical field.
Background technique
Along with the fast development of engineering technology, laser level has gradually replaced traditional ceiling hammer, but again
During construction level control line is successively moved up, biggish error will form using traditional ceiling hammer, especially high level is built
It builds in super high-rise building, the verticality of building is more difficult to control, and is easy to be influenced by natural environment, although at present
Various laser levels emerge one after another in the market, but the scope of application is all more narrow, are practically applicable to various knots without one kind
The portable laser level of structure.
Compared with traditional ceiling hammer, this level is easy to operate, can reduce the throwing of the manpower in ceiling hammer use process
Enter, compared with common laser level, structure of various shapes can be suitable for, while control line can be reduced and transmitted in interlayer
Error in the process；In addition, the production of this level is simple, cost is relatively low, and material input amount is smaller, practical, can be extensive
It promotes the use of.
Therefore, it needs development of practical by force and a kind of high portable construction of construction efficiency with laser level is solution
The key point of above-mentioned technical problem.
Summary of the invention
For many shortcomings and deficiencies present in above-mentioned background technique, this level is improved and has been innovated to this,
Mesh have be to provide it is a kind of can adapt in site operation complicated and severe execution conditions, knot of different shapes can be suitable for
Structure has such a portable construction laser level of certain practical value.
Another goal of the invention of this level is to realize that installation is simple, convenient, fast, portable, can greatly improve and apply
Work efficiency rate and construction precision are conducive to improve construction speed and construction quality, reduce the throwing of the manpower in ceiling hammer use process
Enter and reduce error of the control line in interlayer transmittance process.
In order to solve the above problem and reach above-mentioned goal of the invention, a kind of portable construction of this level is thrown with laser
Line instrument is realized by using following design structure and using following technical solution:
As a kind of improvement of portable construction laser level of this level, including laser level ontology
(1), it is characterised in that: gun sight (13), spirit level are sequentially installed from left to right on the top of laser level ontology (1)
(14) and (12) are switched；Laser lamp (11) are respectively equipped on the bottom end oblique section Liang Ge of laser level ontology (1)；Swashing
The middle part of light level ontology (1) is equipped with the handle (15) of conjoined structure, and handle (15) is penetrating through laser level ontology (1) just
Reverse side；Power supply unit is additionally provided in the inside of laser level ontology (1).
The improvement above-mentioned as this level, the laser level ontology (1) generally " inverted v-shaped " structure should "
The laser level ontology (1) of V-shaped " structure fastens and connect with superstructure plate (32) and structural beams (34), is connected together
For be directly fixed connect shape it is integral or by limit rope binding connection shape it is integral.
The further improvement above-mentioned as this level is coated in the outer surface of laser level ontology (1) and has
The coating of color either antirust coat, antirust coat includes epoxy zinc rich primer and chlorinated rubber finish.
The further improvement above-mentioned as this level, the coating are yellow paint, so that it is not easy corrosion, prolong
Long life；The antirust coat further includes among the epoxy micaceous iron between epoxy zinc rich primer and chlorinated rubber finish
Paint.
The total quantity of the further improvement above-mentioned as this level, the laser lamp (11) is set as two, two
Laser lamp (11) is respectively arranged on two oblique sections up and down of laser level ontology (1), and the laser lamp (11) uses
Infrared ray light linearly invests front end and lower end when opening respectively.
The further improvement above-mentioned as this level, is equipped with kissing therewith in the external activity of laser lamp (11) and matches
Shield, the shield be glass protecting cover, make its not cracky, prolong the service life.
Again further improvement, the switch (12) above-mentioned as this level generally moulds the strip arc structure of system
Part, the strip arc component are set to the top of handle (156), for controlling the opening and closing of laser lamp (11), and in the switch
(12) external hand-held part region is provided with several rubber antiskid protrusions；The spirit level (14) is electronic level either gas
Steep spirit level.
Again again further improvement, the spirit level (14) above-mentioned as this level is electronic level, the electronics
Spirit level is mounted on the upper end outer wall of laser level ontology (1), and the spirit level (14) is located at switch (12) and gun sight
(13) between, for showing whether the plane vertical with the light beam that the laser lamp (11) is issued be horizontal.
As this level it is above-mentioned again be more further improved again, the strip knot of the handle (15) generally hollow out
Structure is provided with compatible rubber antiskid set (15a) therewith, in the rubber antiskid set on the handle (15) of the strip structure
Several non-slip process objects are provided on (15a).
It is more further improved again again as above-mentioned the going back of this level, the power supply unit includes charge port (16) and stores
Battery (17) and two core flexible cords (18), wherein the two cores flexible cord (18), for connecting battery (17), switch (12), filling
Power port (16) and laser lamp (11)；The battery (17) is used to charge for level (1)；The charge port (16) is Micro
USB interface.
The application when in use, can launch laser beam respectively in the horizontal and vertical directions, will be on vertical direction
The straight line released of laser beam alignment lower layer, the position that horizontal laser beam is passed through is linear projection of lower layer on upper layer
Horizontal line.
The spirit level (14) is arranged in the upper end of level (1), when using level (1), passes through air level (14)
Position adjust level (1), be allowed in horizontality.
The handle (15) forms integral structure with level (1) ontology, stops handle (15) in use, holding, will throw line
The interior card rectangular card of instrument (1) is at the external corner of concrete component.
Generated beneficial effect is this level compared with prior art:
1, the installation of this level is simple, convenient, fast, substantially increases construction efficiency and construction precision, is conducive to improve
Construction speed and construction quality；
2, the laser level shell of this level is made of duroplasts, and fastness is very high, environmentally protective, reduces material and throws
Enter, reduces cost, it is practical strong compared with property；
3, this level can reduce the investment of the manpower in ceiling hammer use process；
4, this level can be suitable for structure of various shapes；
5, this level can reduce error of the control line in interlayer transmittance process.
Detailed description of the invention
The specific embodiment of this level is described in further detail with reference to the accompanying drawing, in which:
Fig. 1 is the ontology drawing one of this level；
Fig. 2 is the ontology drawing two of this level；
Fig. 3 is the sectional view of this level；
Fig. 4 is the top view of this level；
Fig. 5 is the bottom view of this level；
Fig. 6 is the front view of this level；
Fig. 7 is the front view of this level；
Fig. 8 is the rearview of this level；
Fig. 9 is A-frame drawing；
Figure 10 is the first embodiment use state of this level with reference to figure；
Figure 11 is second of embodiment use state of this level with reference to figure；
Figure 12 is the third embodiment use state of this level with reference to figure；
Figure 13 is the ontology operation chart of this level；
Wherein, figure label: 1-level ontology, 11-laser lamps, 12-switches, 13-gun sights, 14-levels
Device, 15-handles, 16-charge ports, 17-batteries, 18-two core flexible cords, 19-bracket fixation holes, 2-laser beams, 21-
Horizontal laser beam, 22-vertical laser beams, 31-arcuate structure plates, 32-superstructure plates, 33-understructure plates, 34-knots
Structure beam, 35-structural columns, 36-throwing string holes, 4-A-frames, 41-bolt fixed links, 42-air levels, 43-cradling pieces,
44-adjusting knobs, 5-arc-shaped projection lines, 6-horizontal control lines, 7-horizontal control lines projection lines, 8-alien invasions are vertically controlled
Line processed, 9-control points.
Specific embodiment
In order to which the technical means, creative features, achievable purpose and effectiveness for realizing this level are easy to understand, below
Further detailed description is made to the technical solution of this level in conjunction with attached drawing and specific embodiment.
Embodiment 1 (for horizontal control lines interlayer transmitting)
The device is spare for before being worked, needing to be assembled conduct, and specific mode of operation is as follows:
Step 1: it is as shown in Figure 10, first that lower floor floor cleaning is clean, expose horizontal control lines；
Step 2: a kind of portable construction laser level 1 of this level is stuck in upper layer concrete structure structure
On the external corner of part；
Step 3: 12 are turned on the switch, outgoing laser beam 2；
Step 4: vertical laser beam 21 is directed at lower layer's horizontal control lines 6；
Step 5: the spirit level 14 of this level 1 is leveled between two parties；
Step 6: check whether vertical laser beam 21 is directed at lower layer's horizontal control lines 6 again；
Step 7: upper layer horizontal control lines are popped up in the position that horizontal laser beam 22 is passed through.
After above-mentioned a use process, this level 1 is removed, specific steps are as follows:
Step 1: operator is first shut off the switch 12 of this level 1；
Step 2: finally this level 1 is removed.
Embodiment 2 (system of putting of the control line on arc-shaped curved surface)
As shown in figure 11, a kind of portable construction laser level, including laser level ontology 1, feature
It is: gun sight 13, spirit level 14 and switch 12 is sequentially installed from left to right on the top of laser level ontology 1；?
Laser lamp 11 is respectively equipped on the bottom end oblique section Liang Ge of laser level ontology 1；It is equipped at the middle part of laser level ontology 1
The handle 15 of conjoined structure, handle 15 penetrate through the front and back sides of laser level ontology 1；The inside of laser level ontology 1 also
Equipped with power supply unit；Wherein, A-frame fixation hole 19 is equipped at the buckle of laser level 1；In addition, this laser level
1 is used as ancillary equipment with A-frame 4.
Second of embodiment needs to be assembled before carrying out use as spare, when assembling, needs to set in advance
A-frame 4 is set as auxiliary collocation and completes operation.
Specific operation is as follows:
As shown in figure 11, due on arcuate structure plate 31 line of ink marker be not easy to be straightened, when bullet control line, easily causes error, this
Level 1 can be come out the control line projection 7 in cambered surface by laser beam 2, snap the line is then segmented, to reduce error.Tool
Body is using steps are as follows:
Step 1: first the region that cambered surface upper control line passes through probably is swept out；
Step 2: two endpoints of control line are found out in cambered surface as control point 1 using tape measure, total station etc.；
Step 3: A-frame is fixed on this level 1, and is tightened；
Step 4: this level is placed between two control points 9, turns on the switch 12, outgoing laser beam 11；
Step 5: laser beam 2 is directed at two control points 9 of control；
Step 6: keep the air level 42 on A-frame 4 placed in the middle by 4 upper knob 44 of adjusting triangle bracket；
Step 7: check whether laser beam 2 is directed at two control points 9 again；
Step 8: after the completion of above-mentioned steps, the position that laser beam 2 is passed through is throwing of the horizontal control lines 6 in cambered surface
Hachure 7；
Step 9: the segmentation pop-up line of ink marker in 2 paths traversed of laser beam, then connected the multistage line of ink marker come is popped up
Get up the horizontal control lines needed for.
After above-mentioned a use process, this level 1 is removed, specific steps are as follows:
Step 1: that closes this level 1 opens the light 12；
Step 2: this level 1 is removed together with A-frame 4；
Step 3: A-frame 4 is taken off from level 1.
The A-frame fixation hole 19, aperture match with 41 overall diameter of bolt fixed link on A-frame 4,
Inner wall is helical structure.
In above-mentioned entire implementation operating process, A-frame 4 is bolted bar 41, fixed face 45 and three
The identical cradling piece 43 of root forms, and 41 upper end of standing screw is equipped with helical structure, the A-frame on outer diameter and level
The internal diameter of fixation hole 19 matches.
Wherein, it is connected between bolt fixed link 41 and three cradling pieces 43 using fixed face 45, in fixed face 45
Side be equipped with air level 42, the level for adjusting triangle bracket 4.
43 quantity of cradling piece is three, every cradling piece 43 inlayed by two different hollow cylinders of diameter and
At, wherein the outer diameter of upper hollow cylindrical body and the internal diameter of lower hollow cylindrical body match, and two cylindricals are at can pull
Structure, it is upper in lower hollow cylindrical body to have installed adjusting knob 44, when knob 44 is unscrewed, A-frame 4 is adjusted
Height, after the completion of height adjusts, knob 44 is tightened fixed.
Embodiment three (for measuring the perpendicularity deviation of high-rise)
As shown in figure 12, when measurement high-rise obtains perpendicularity deviation, the first floor is generally obtained into horizontal control with ceiling hammer
Line 7 processed is hung to top layer, this process operator, which generally requires to climb to, carries out messenger wire on outrigger, on the one hand, fallen on outrigger
Line security risk is larger；On the other hand, building is higher, wind-force ceiling hammer must be influenced it is also bigger, hang out line be easy
There are errors, and while being projected horizontal control lines to top layer using this level can reduce security risk and by natural ring
Border must influence, and error is smaller.It is specifically used that steps are as follows:
Step 1: when floor pours, must onboard 3 to 4 throwing string holes 1 of indwelling, notice that every layer of throwing string holes 1 must be same
On one vertical line；
Step 2: first floor horizontal control lines 6 are successively projected to top layer with plummet instrument；
Step 3: by being stuck on the external corner of top exterior wall for this level 1；
Step 4: 12 are turned on the switch；
Step 5: vertical laser beam 2 is directed at first floor horizontal control lines 6；
Step 6: the spirit level 14 on level is adjusted between two parties, guarantees the level of level 1；
Step 7: check whether vertical laser beam 22 is directed at first floor horizontal control lines 6 again；
Step 8: straight line is popped up in 21 paths traversed of horizontal laser beam, as lower layer's horizontal control lines 6 are in top layer
Projection line 7；
Step 9: the straight line that the straight line launched with level 1 is launched with plummet instrument being compared, is measured, and judges to build
The perpendicularity deviation of object.
After above-mentioned a use process, this level 1 is removed, specific steps are as follows:
Step 1: the switch 12 of this level 1 is closed；
Step 2: this level 1 is removed.
In conclusion this level has the advantage, that in a specific embodiment
The installation of this level is simple, convenient, fast, substantially increases construction efficiency and construction precision, is conducive to improve and apply
Work progress and construction quality；The laser level shell is made of duroplasts, and fastness is very high, environmentally protective, reduces material and throws
Enter, reduces cost, it is practical strong compared with property；The investment of the manpower in ceiling hammer use process can be reduced；It can be suitable for various shapes
The structure of shape；, error of the control line in interlayer transmittance process can be reduced, therefore can be with wide popularization and application.
Finally, it should be noted that above in conjunction with the embodiments with attached drawing to the design of this level, specific structure and production
Raw technical effect is clearly and completely described, to be completely understood by the purpose, feature and effect of this level.Obviously, institute
The embodiment of description is a part of the embodiment of this level, rather than whole embodiments, the embodiment based on this level,
Those skilled in the art's other embodiments obtained without creative efforts belong to this level guarantor
The range of shield.In addition, all connections being previously mentioned in text, connection relationship, not singly refer to that component directly connects, and referring to can basis
Situation is embodied, by adding or reducing couple auxiliary, to form more preferably coupling structure.It is each in the creation of this level
Technical characteristic, can be with combination of interactions under the premise of not conflicting conflict.
Claims (10)
1. a kind of portable construction laser level, including laser level ontology (1), it is characterised in that: in laser
The top of level ontology (1) is sequentially equipped with gun sight (13), spirit level (14) and switch (12) from left to right；In laser
Laser lamp (11) are respectively equipped on the bottom end oblique section Liang Ge of level ontology (1)；It is set in the middle part of laser level ontology (1)
There is the handle (15) of conjoined structure, handle (15) penetrates through the front and back sides of laser level ontology (1)；In laser level ontology
(1) inside is additionally provided with power supply unit.
2. a kind of portable construction laser level according to claim 1, it is characterised in that: the laser
Level ontology (1) generally " inverted v-shaped " structure is somebody's turn to do the laser level ontology (1) and superstructure of " inverted v-shaped " structure
Plate (32) and structural beams (34) fasten connection, and being connected together, to connect shape integral or pass through limit to be directly fixed
Position rope binding connection shape is integral.
3. a kind of portable construction laser level according to claim 2, it is characterised in that: thrown in laser
The outer surface of line instrument ontology (1) is coated with coloured coating either antirust coat, and antirust coat includes epoxy zinc rich primer
And chlorinated rubber finish.
4. a kind of portable construction laser level according to claim 3, it is characterised in that: the coating
For yellow paint, so that it is not easy corrosion, prolong the service life；The antirust coat further includes being located at epoxy zinc rich primer and chlorine
Change the epoxy micaceous iron intermediate coat between rubber finishing coat.
5. a kind of portable construction laser level according to claim 1, it is characterised in that: the laser
The total quantity of lamp (11) is set as two, and two laser lamps (11) are respectively arranged at two up and down of laser level ontology (1)
On oblique section, and the laser lamp (11) uses infrared ray light, linearly invests front end and lower end when opening respectively.
6. a kind of portable construction laser level according to claim 5, it is characterised in that: in laser lamp
(11) external activity is equipped with the shield that kissing therewith is matched, and the shield is glass protecting cover, makes its not cracky, prolongs
Long life.
7. a kind of portable construction laser level according to claim 1, it is characterised in that: the switch
(12) the strip arc component of system is generally moulded, which is set to the top of handle (15), for controlling
The opening and closing of laser lamp (11), and the external hand-held part region of the switch (12) is provided with several rubber antiskid protrusions；The water
Quasi- device (14) is electronic level either spirit lever.
8. a kind of portable construction laser level according to claim 1, it is characterised in that: the level
Device (14) is electronic level, which is mounted on the upper end outer wall of laser level ontology (1), and the spirit level
(14) it is located between switch (12) and gun sight (13), it is vertical with the light beam that the laser lamp (11) is issued for showing
Whether plane is horizontal.
9. a kind of portable construction laser level according to claim 1, it is characterised in that: the handle
(15) it is anti-to be provided with compatible rubber therewith on the handle (15) of the strip structure for the generally strip structure of hollow out
Sliding sleeve (15a) is provided with several non-slip process objects on the rubber antiskid set (15a).
10. a kind of portable construction laser level according to claim 1, it is characterised in that: the confession
Electric installation includes charge port (16) battery (17) and two core flexible cords (18), wherein the two cores flexible cord (18), for connecting
Battery (17), switch (12), charge port (16) and laser lamp (11)；The battery (17) is used to charge for level (1)；
The charge port (16) is Micro USB interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810852047.9A CN109029397B (en) | 2018-07-30 | 2018-07-30 | Portable laser demarcation device for building construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810852047.9A CN109029397B (en) | 2018-07-30 | 2018-07-30 | Portable laser demarcation device for building construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109029397A true CN109029397A (en) | 2018-12-18 |
| CN109029397B CN109029397B (en) | 2024-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810852047.9A Active CN109029397B (en) | 2018-07-30 | 2018-07-30 | Portable laser demarcation device for building construction |
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| Country | Link |
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| CN (1) | CN109029397B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109839103A (en) * | 2019-04-15 | 2019-06-04 | 湖南科技大学 | Adjustable type curve level and usage for building construction measurement |
| CN112729227A (en) * | 2020-12-31 | 2021-04-30 | 宁波建工工程集团有限公司 | Tower crane wall-attached measurement auxiliary device and using method thereof |
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| CN109029397B (en) | 2024-02-06 |
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