CN110455269A - A kind of architectural engineering plummet - Google Patents
A kind of architectural engineering plummet Download PDFInfo
- Publication number
- CN110455269A CN110455269A CN201910545464.3A CN201910545464A CN110455269A CN 110455269 A CN110455269 A CN 110455269A CN 201910545464 A CN201910545464 A CN 201910545464A CN 110455269 A CN110455269 A CN 110455269A
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- groove
- main body
- wall
- bottom end
- bullet
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- 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.)
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- 239000012212 insulator Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims 1
- 230000005484 gravity Effects 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 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
- G01C15/10—Plumb lines
- G01C15/105—Optical plumbing
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention belongs to Architectural Equipment technical fields, especially a kind of architectural engineering plummet, it is easy to knot for plummet rope, the problem of to make troubles to worker's construction, now propose following scheme, including main body, the bottom end of the main body offers the first groove, the main body carves in the inner wall of the first groove and is equipped with screw thread, the main body is equipped with thread bush in the first groove, the bottom end of thread bush is welded with bullet, and the bottom of bullet offers the first cavity, and the bullet is bonded with second laser lamp at the top inner wall of the first cavity.The present invention pulls loose mobile bar by the self gravity of connecting rope and main body, two conducting blocks are made to contact the first contact and the second wafer respectively, connect second laser lamp and battery, second laser lamp emits light, light projects inside the second through-hole of bullet bottom end, is irradiated on ground, can form vertical line, it is too long and cause to knot to avoid connecting rope for the verticality for detecting metope.
Description
Technical field
The present invention relates to Architectural Equipment technical field more particularly to a kind of architectural engineering plummets.
Background technique
Among engineering construction, the verticality of wall is the important indicator of a construction quality, if the error mistake of verticality
Greatly, it is unqualified to will cause building, is easy inclination and collapses, worker can make weight line by plummet when building, convenient for determining wall
The depth of parallelism of wall and weight line.
When worker uses plummet, plummet can be put down automatically by rope, the location of rope is exactly to hang down with horizontal plane
Straight weight line, which is generally all rope by that can shrink when in use, puts down a certain distance for plummet, but this side
Formula can make the bad folding and unfolding of plummet, and rope can knot sometimes, to make troubles to worker's construction, we have proposed one kind to build thus
Build engineering plummet.
Summary of the invention
It is easy to knot based on plummet rope, so that the invention proposes one the technical issues of making troubles to worker's construction
Kind architectural engineering plummet.
A kind of architectural engineering plummet proposed by the present invention, including main body, the bottom end of the main body offer the first groove,
The main body carves in the inner wall of the first groove and is equipped with screw thread, and the main body is equipped with thread bush, the bottom of thread bush in the first groove
End is welded with bullet, and the bottom of bullet offers the first cavity, and the bullet glues at the top inner wall of the first cavity
It is connected to second laser lamp, the bullet offers the second through-hole at the bottom end inner wall of the first cavity, and the bullet is
First through hole is offered at the top inner wall of one cavity, first through hole extends to the inside of thread bush, the inside of the thread bush
If the bottom end and top of battery are respectively equipped with the first spring and second spring equipped with dry cell, the bottom end of first spring is viscous
It is connected to first insulator, the bottom end of first insulator is Nian Jie with bullet, and it is logical that third is offered in the middle part of the first insulator
Hole, is welded with conducting wire between the anode and second laser lamp of the battery, conducting wire runs through third through-hole and the second through-hole, and described the
The inner wall of dual-laser lamp and the first cavity is welded with conducting wire, and the material of the main body and the bullet is metal.
Preferably, the top of the main body is welded with two fixed plates, and the middle part of two fixed plates offers round logical
Hole, two fixed plates are equipped with mobile bar at circular through hole, and the bottom end of mobile bar is welded with two locating rods, the main body
Top be bonded with fixed body, the top of fixed body is opened up there are two the first groove, the bottom end of the locating rod and first recessed
The inside of slot, the bottom end of locating rod are welded with third spring, and the material of the locating rod and the mobile bar is metal.
Preferably, the fixed body offers the second groove, the fixation at the side inner wall of two the first grooves
Body is bonded with the first contact and the second wafer respectively at the side inner wall of two the second grooves, and the fixed body is in the second groove
Inside be equipped with conducting block, the side of conducting block and locating rod are welded, are welded between first contact and the cathode of battery
Conducting wire, the side of the second wafer are welded with conducting rod, and conducting rod is L-shaped, and the other end and main body of the conducting rod weld.
Preferably, the top of the conducting block is arc-shaped, and first contact and the second wafer are V-shaped.
Preferably, pulley is rotatably connected in the middle part of the mobile bar, the outer wall of pulley offers arc groove, the cunning
Wheel is equipped with connecting rope at arc groove, and the other end of connecting rope is bonded with fixed block, and it is recessed that the top of fixed block offers third
Slot, the fixed block are welded with fixed link between the two sides inner wall of third groove.
Preferably, the two sides of the fixed block offer the 4th groove, top end of the fixed block in the 4th groove
It is rotatably connected to rotor plate, the bottom end side of rotor plate is arc-shaped, and the fixed block is arc-shaped in the bottom end inner wall of the 4th groove.
Preferably, the outer wall of the main body offers annular groove, and the main body is equipped with first in the inner wall of annular groove
Laser lamp, first laser lamp are in parallel with second laser lamp.
Having the beneficial effect that in the present invention
1, by the way that second laser lamp, battery, conducting block, locating rod, mobile bar, conducting rod, the first contact and the second wafer is arranged,
Body normal is downward, and by connecting rope and main body self gravity, connecting rope is straightened, and connecting rope pulls loose mobile bar, mobile bar meeting
Locating rod is driven to move up, locating rod drives two conducting blocks to contact the first contact and the second wafer respectively, passes through main body, cone
Body, locating rod, the electric conductivity of mobile bar and conducting rod, can connect second laser lamp and battery, emit second laser lamp
Light, light are projected inside the second through-hole of bullet bottom end, are irradiated on ground, can form vertical line, detect wall
It is too long and cause to knot to avoid connecting rope for the verticality in face；
2, pass through the first spring of setting, second spring and the second laser lamp being connected with the anode of battery, the first spring and second
Spring guarantees to be in close contact between battery, forms series connection, welding lead between the anode and second laser lamp of battery can be to avoid
Electric leakage, causes electric quantity loss；
3, the conducting block arc-shaped by setting top, the first V-shaped contact and the second wafer, move up convenient for conducting block
When, it can be in close contact with the first contact and the second wafer；
4, by the way that the arc groove and fixed link of pulley is arranged, the arc groove of pulley can make connecting rope be in the center of gravity of device
Position avoids deviating, and new rope can be connected by fixed link, and when out of power convenient for device, device can be continued to use；
5, by the way that the first laser lamp in parallel with second laser lamp is arranged, when main body is vertically put down, main body is because of self gravity
It acts on vertically downward, the first laser lamp inside body outer wall arc groove is switched on battery at this time, launches horizon light
Line projects on wall, is convenient for people's detection level degree.
Detailed description of the invention
Fig. 1 is a kind of schematic cross-sectional view for architectural engineering plummet that embodiment 1 proposes；
Fig. 2 is a kind of schematic view of the front view for architectural engineering plummet that embodiment 1 proposes；
Fig. 3 is the portion the A enlarged structure schematic diagram of Fig. 1；
Fig. 4 is the portion the B enlarged structure schematic diagram of Fig. 1；
Fig. 5 is the portion the C enlarged structure schematic diagram of Fig. 1；
Fig. 6 is the portion the D enlarged structure schematic diagram of Fig. 4；
Fig. 7 is a kind of schematic cross-sectional view for architectural engineering plummet that embodiment 2 proposes.
In figure: 1 main body, 2 thread bush, 3 bullets, 301 first through hole, 302 second through-holes, 4 first insulators, 5 first
Spring, 6 batteries, 7 second springs, 8 second insulators, 9 first laser lamps, 10 fixed plates, 11 mobile bars, 12 fixed blocks, 13 connect
Splicing, 14 second laser lamps, 15 pulleys, 16 locating rods, 1601 third springs, 17 conducting rods, 18 fixed bodies, 19 fixed links, 20
Rotor plate, 21 conducting blocks, 22 contacts.
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.
Embodiment 1
Referring to Fig.1-6, a kind of architectural engineering plummet, including main body 1, the bottom end of main body 1 offer the first groove, and main body 1 exists
The inner wall of first groove, which is carved, is equipped with screw thread, and main body 1 is equipped with thread bush 2 in the first groove, and the bottom end of thread bush 2 is welded with taper
Body 3, the bottom of bullet 3 offer the first cavity, and bullet 3 is bonded with second laser lamp at the top inner wall of the first cavity
14, bullet 3 offers the second through-hole 302 at the bottom end inner wall of the first cavity, and the light of second laser lamp 14 can pass through
Second through-hole 302 irradiates vertically downward, and bullet 3 offers first through hole 301 at the top inner wall of the first cavity, and first is logical
Hole 301 extends to the inside of thread bush 2, if the inside of thread bush 2 is equipped with dry cell 6, the bottom end and top of battery 6 are respectively equipped with
First spring 5 and second spring 7, the first spring 5 and second spring 7 can guarantee to be in close contact between battery 6, form series connection,
The bottom end of first spring 5 is bonded with first insulator 4, and the bottom end of first insulator 4 is Nian Jie with bullet 3, first insulator 4
Middle part offers third through-hole, is welded with conducting wire between the anode and second laser lamp 14 of battery 6, can cause to avoid electric leakage
Electric quantity loss, conducting wire run through third through-hole and the second through-hole 302, and the inner wall of second laser lamp 14 and the first cavity, which is welded with, leads
The material of line, main body 1 and bullet 3 is metal, can be conductive by main body 1 and bullet 3.
In the present invention, the top of main body 1 is welded with two fixed plates 10, and the middle part of two fixed plates 10 offers circle
Through-hole, two fixed plates 10 are equipped with mobile bar 11 at circular through hole, and the bottom end of mobile bar 11 is welded with two locating rods 16, main
The top of body 1 is bonded with fixed body 18, and the top of fixed body 18 is opened up there are two the first groove, the bottom end of locating rod 16 and the
The inside of one groove, the bottom end of locating rod 16 are welded with third spring 2601, and the material of locating rod 16 and mobile bar 11 is gold
Belong to, conductive, locating rod 16 can be mobile in the first inside grooves.
Wherein, fixed body 18 offers the second groove at the side inner wall of two the first grooves, and fixed body 18 is two
The first contact 2201 and the second wafer 2202 are bonded at the side inner wall of a second groove respectively, fixed body 18 is in the second groove
Inside be equipped with conducting block 21, the side of conducting block 21 and locating rod 16 are welded, between the first contact 2201 and the cathode of battery 6
Be welded with conducting wire, the side of the second wafer 2202 is welded with conducting rod 17, and conducting rod 17 is L-shaped, the other end of conducting rod 17 with
Main body 1 is welded, and mobile bar 11 is pulled, and mobile bar 11 will drive locating rod 16 and move up, and locating rod 16 stretches third spring
1601, locating rod 16 drives conducting block 21 mobile, and two conducting blocks 21 contact the first contact 2201 and the second wafer 2202 respectively,
By main body 1, bullet 3, locating rod 16 and mobile bar 11 electric conductivity, second laser lamp 14 and battery 6 can be connected.
Wherein, the top of conducting block 21 is arc-shaped, and the first contact 2201 and the second wafer 2202 are V-shaped, convenient for conduction
When block 21 moves up, it can be in close contact with the first contact 2201 and the second wafer 2202.
Wherein, the middle part of mobile bar 11 is rotatably connected to pulley 15, and the outer wall of pulley 15 offers arc groove, pulley 15
Connecting rope 13 is equipped at arc groove, arc groove can make connecting rope 13 be in the position of centre of gravity of device, avoid deviating, even
The other end of splicing 13 is bonded with fixed block 12, and the top of fixed block 12 offers third groove, and fixed block 12 is in third groove
Two sides inner wall between be welded with fixed link 19, rope can be connected by fixed link 19, when out of power convenient for device, device can be with
It continues to use.
Wherein, the two sides of fixed block 12 offer the 4th groove, and fixed block 12 is rotated in the top end of the 4th groove to be connected
It is connected to rotor plate 20, the bottom end side of rotor plate 20 is arc-shaped, and fixed block 12 is arc-shaped in the bottom end inner wall of the 4th groove, bottom end
The arc-shaped rotor plate 20 in side rotates rotor plate 20 convenient for people, and rotor plate 20 can form 90 with fixed block 12 after rotating
Angle is spent, fixed block 12 is held convenient for people, uses the device.
In use, the rotor plate 20 arc-shaped by bottom end side, rotates rotor plate 20 convenient for people, 20 turns of rotor plate
90 degree of angles can be formed with fixed block 12 after dynamic, hold fixed block 12 convenient for people and pass through at this point, making main body 1 vertically downward
1 self gravity of connecting rope 13 and main body, connecting rope 13 are straightened, and connecting rope 13 pulls loose mobile bar 11, and mobile bar 11 will drive fixed
Position bar 16 moves up, and locating rod 16 stretches third spring 1601, and locating rod 16 drives conducting block 21 mobile, two conducting blocks 21
The first contact 2201 and the second wafer 2202 are contacted respectively, pass through main body 1, bullet 3, locating rod 16, mobile bar 11 and conduction
The electric conductivity of bar 17 can connect second laser lamp 14 and battery 6, and second laser lamp 14 is made to emit light, and light is from bullet 3
It is projected inside second through-hole 202 of bottom end, is irradiated on ground, vertical line can be formed, detect the verticality of metope；
When replacing battery 6, rotating cone body 3, bullet 3 drives thread bush 2 to rotate, and separates thread bush 2 with main body 1, at this time
Battery 6 can be removed, simultaneously because being welded with conducting wire between the anode of battery 6 and second laser lamp 14, can make to avoid electric leakage
At electric quantity loss.
Embodiment 2
Referring to Fig. 7, a kind of architectural engineering plummet, the present embodiment makes compared to embodiment 1 in order to increase the practicability of device
Device can detecte levelness, and the outer wall of main body 1 offers annular groove, and main body 1 is equipped with first in the inner wall of annular groove and swashs
Light lamp 9, first laser lamp 9 is in parallel with second laser lamp 14, and when main body 1 is vertically put down, main body 1 is due to self gravitation effect
Vertically downward, the first laser lamp 9 at this time inside 1 outer wall arc groove of main body launches horizontal light, projects on wall,
Convenient for people's detection level degree.
In use, the rotor plate 20 arc-shaped by bottom end side, rotates rotor plate 20 convenient for people, 20 turns of rotor plate
90 degree of angles can be formed with fixed block 12 after dynamic, hold fixed block 12 convenient for people and pass through at this point, making main body 1 vertically downward
1 self gravity of connecting rope 13 and main body, connecting rope 13 are straightened, and connecting rope 13 pulls loose mobile bar 11, and mobile bar 11 will drive fixed
Position bar 16 moves up, and locating rod 16 stretches third spring 1601, and locating rod 16 drives conducting block 21 mobile, two conducting blocks 21
The first contact 2201 and the second wafer 2202 are contacted respectively, pass through main body 1, bullet 3, locating rod 16, mobile bar 11 and conduction
The electric conductivity of bar 17 can connect second laser lamp 14 and battery 6, and second laser lamp 14 is made to emit light, and light is from bullet 3
It is projected inside second through-hole 202 of bottom end, is irradiated on ground, vertical line can be formed, detect the verticality of metope；
When replacing battery 6, rotating cone body 3, bullet 3 drives thread bush 2 to rotate, and separates thread bush 2 with main body 1, at this time
Battery 6 can be removed, simultaneously because being welded with conducting wire between the anode of battery 6 and second laser lamp 14, can make to avoid electric leakage
At electric quantity loss；
Since first laser lamp 9 is in parallel with second laser lamp 14, when main body 1 is vertically put down, main body 1 is because of self gravitation effect
And vertically downward, the first laser lamp 9 inside 1 outer wall arc groove of main body is switched on battery 6 at this time, launches horizon light
Line projects on wall, is convenient for people's detection level degree.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (7)
1. a kind of architectural engineering plummet, including main body (1), which is characterized in that it is recessed that the bottom end of the main body (1) offers first
Slot, the main body (1) carve in the inner wall of the first groove and are equipped with screw thread, and the main body (1) is equipped with thread bush in the first groove
(2), the bottom end of thread bush (2) is equipped with bullet (3), and the bottom of bullet (3) offers the first cavity, the bullet (3)
Second laser lamp (14) are equipped at the top inner wall of the first cavity, the bullet (3) is at the bottom end inner wall of the first cavity
It offering the second through-hole (302), the bullet (3) offers first through hole (301) at the top inner wall of the first cavity, the
One through-hole (301) extends to the inside of thread bush (2), the thread bush (2) if inside be equipped with dry cell (6), battery (6)
Bottom end and top are respectively equipped with the first spring (5) and second spring (7), and the bottom end of first spring (5) is equipped with the first insulation
The bottom end of body (4), first insulator (4) is fixedly connected with bullet (3), and is offered in the middle part of the first insulator (4)
Three through-holes, are equipped with conducting wire between the anode and second laser lamp (14) of the battery (6), conducting wire is logical through third through-hole and second
The inner wall of hole (302), the second laser lamp (14) and the first cavity is equipped with conducting wire, the main body (1) and the bullet (3)
Material be metal.
2. a kind of architectural engineering plummet according to claim 1, which is characterized in that the top of the main body (1) is equipped with
Two fixed plates (10), the middle part of two fixed plates (10) offer circular through hole, and two fixed plates (10) are in circle
Through hole is equipped with mobile bar (11), and the bottom end of mobile bar (11) is set there are two locating rod (16), and the top of the main body (1) is equipped with
Fixed body (18), the top of fixed body (18) are opened up there are two the first groove, the bottom end of the locating rod (16) and first recessed
The inside of slot, the bottom end of locating rod (16) are equipped with third spring (2601), the locating rod (16) and the mobile bar (11)
Material is metal.
3. a kind of architectural engineering plummet according to claim 2, which is characterized in that the fixed body (18) is at two
The second groove, side inner wall punishment of the fixed body (18) in two the second grooves are offered at the side inner wall of one groove
Not She You the first contact (2201) and the second wafer (2202), the fixed body (18) the inside of the second groove be equipped with conducting block
(21), the side of conducting block (21) is fixedly connected with locating rod (16), the cathode of first contact (2201) and battery (6) it
Between be equipped with conducting wire, the side of the second wafer (2202) is equipped with conducting rod (17), and conducting rod (17) is L-shaped, the conducting rod
(17) the other end is fixedly connected with main body (1).
4. a kind of architectural engineering plummet according to claim 3, which is characterized in that the top of the conducting block (21) is in
Arc, first contact (2201) and the second wafer (2202) are V-shaped.
5. a kind of architectural engineering plummet according to claim 2, which is characterized in that the middle part of the mobile bar (11) turns
Dynamic to be connected with pulley (15), the outer wall of pulley (15) offers arc groove, the pulley (15) company of being equipped at arc groove
The other end of splicing (13), connecting rope (13) is equipped with fixed block (12), and the top of fixed block (12) offers third groove, described
Fixed block (12) is equipped with fixed link (19) between the two sides inner wall of third groove.
6. a kind of architectural engineering plummet according to claim 5, which is characterized in that the two sides of the fixed block (12) are equal
The 4th groove is offered, the fixed block (12) is rotatably connected to rotor plate (20), rotor plate in the top end of the 4th groove
(20) bottom end side is arc-shaped, and the fixed block (12) is arc-shaped in the bottom end inner wall of the 4th groove.
7. a kind of architectural engineering plummet according to claim 2, which is characterized in that the outer wall of the main body (1) opens up
There is annular groove, the main body (1) is equipped with first laser lamp (9) in the inner wall of annular groove, and first laser lamp (9) swashs with second
Light lamp (14) is in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910545464.3A CN110455269A (en) | 2019-06-22 | 2019-06-22 | A kind of architectural engineering plummet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910545464.3A CN110455269A (en) | 2019-06-22 | 2019-06-22 | A kind of architectural engineering plummet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110455269A true CN110455269A (en) | 2019-11-15 |
Family
ID=68480786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910545464.3A Pending CN110455269A (en) | 2019-06-22 | 2019-06-22 | A kind of architectural engineering plummet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110455269A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432588A (en) * | 2021-06-23 | 2021-09-24 | 河北如成建筑工程有限公司 | Stable drop wire capable of avoiding long-time swinging and operation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104701090A (en) * | 2013-12-04 | 2015-06-10 | 朱玉静 | Contactor contact |
| CN105651271A (en) * | 2014-11-11 | 2016-06-08 | 袁国堂 | Infrared ray plumb |
| CN205919832U (en) * | 2016-08-29 | 2017-02-01 | 日照大象房屋建设有限公司 | Construction line weighs down |
| CN107144270A (en) * | 2017-03-20 | 2017-09-08 | 无锡职业技术学院 | A kind of laser type line pendant |
-
2019
- 2019-06-22 CN CN201910545464.3A patent/CN110455269A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104701090A (en) * | 2013-12-04 | 2015-06-10 | 朱玉静 | Contactor contact |
| CN105651271A (en) * | 2014-11-11 | 2016-06-08 | 袁国堂 | Infrared ray plumb |
| CN205919832U (en) * | 2016-08-29 | 2017-02-01 | 日照大象房屋建设有限公司 | Construction line weighs down |
| CN107144270A (en) * | 2017-03-20 | 2017-09-08 | 无锡职业技术学院 | A kind of laser type line pendant |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432588A (en) * | 2021-06-23 | 2021-09-24 | 河北如成建筑工程有限公司 | Stable drop wire capable of avoiding long-time swinging and operation method thereof |
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