CN108827241A - Angle measurement unit and its measurement method - Google Patents

Angle measurement unit and its measurement method Download PDF

Info

Publication number
CN108827241A
CN108827241A CN201810600428.8A CN201810600428A CN108827241A CN 108827241 A CN108827241 A CN 108827241A CN 201810600428 A CN201810600428 A CN 201810600428A CN 108827241 A CN108827241 A CN 108827241A
Authority
CN
China
Prior art keywords
ruler
annulus
circular scale
scale
measurement unit
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.)
Granted
Application number
CN201810600428.8A
Other languages
Chinese (zh)
Other versions
CN108827241B (en
Inventor
王永杰
张震
佟彦立
郭亮亮
高建超
张誉严
董瀚泽
阴利新
张强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Construction Eighth Engineering Division Co Ltd
Original Assignee
China Construction Eighth Engineering Division Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China Construction Eighth Engineering Division Co Ltd filed Critical China Construction Eighth Engineering Division Co Ltd
Priority to CN201810600428.8A priority Critical patent/CN108827241B/en
Publication of CN108827241A publication Critical patent/CN108827241A/en
Application granted granted Critical
Publication of CN108827241B publication Critical patent/CN108827241B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C9/00Measuring inclination, e.g. by clinometers, by levels
    • G01C9/10Measuring inclination, e.g. by clinometers, by levels by using rolling bodies, e.g. spheres, cylinders, mercury droplets

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

The present invention relates to a kind of angle measurement unit and its measurement method, including annulus, there is the first ruler, on the annulus and intersection of the extended line of the middle line of the first ruler is equipped with mark line;The circular scale being generally aligned in the same plane in annulus and with annulus, circular scale are formed with the second ruler;It is articulated with the cover board in the center of circle of circular scale, the connecting plate including being connected to annulus, annulus and circular scale mutually can be connected rotationally;It is articulated and connected against ruler end part and the second ruler end;Ruler is connected, end is articulated and connected with the end against the end of ruler and the first ruler, and the first ruler, the second ruler are enclosed parallelogram against ruler and connection ruler;Circular scale circumferentially indicate angle index line and with the second ruler perpendicular to the first ruler when mark line correspond to circular scale position be set as zero graduation line;The second ruler in slope surface will be attached at against ruler to be vertically arranged, the corresponding circular scale reading of mark line is the gradient.

Description

Angle measurement unit and its measurement method
Technical field
The present invention relates to the realm of building construction, espespecially a kind of angle measurement unit and its measurement method.
Background technique
It is in the realm of building construction at present to be related to measuring various angles more.Such as the inner corner trim or slope and water of building structure The angle of plane.
The prior art mainly adopts the various measuring tools such as level, theodolite and steel ruler to come step measurement, measuring process Cumbersome, the accumulative measurement error of multi-step is larger, inefficiency.In addition, instrument can not be in rainy day and underwater operation, by environment shadow Sound is larger, the scope of application limitation of measurement, it has not been convenient to carry and use.
Summary of the invention
It is an object of the invention to overcome the deficiencies of existing technologies, a kind of angle measurement unit and its measurement method are provided, The error for solving instrument in the prior art is big, measurement scope of application limitation, the low problem of measurement efficiency.
Realizing the technical solution of above-mentioned purpose is:
The present invention provides a kind of angle measurement unit, including:
Annulus, is formed with the first ruler, and the extended line on the annulus along the center line of first ruler is equipped with Mark line;
The circular scale being generally aligned in the same plane in the annulus and with the annulus, the circular scale one Body is formed with the second ruler;
It is articulated with the center of circle of the circular scale and is located at the side on the circular scale far from the annulus Cover board, the cover board include the connecting plate for being connected to the annulus, so that the annulus and the circular scale can mutually turn It connects dynamicly;
For be attached on structural plane to be measured against ruler, it is described hinged against the end of ruler and the end of second ruler Connection;And
One end and the connection ruler hinged against ruler, the other end and the end of first ruler are hinged, described It is first ruler, second ruler, described against ruler and the connection ruler is enclosed parallelogram;
The circular scale circumferentially indicates angle index line and straight perpendicular to described first with second ruler The position that the mark line corresponds to the circular scale when ruler is set as zero graduation line;By being attached at described against ruler On the structural plane to be measured, so that the reading for reading the corresponding circular scale of the mark line is the gradient.
Angle measurement unit of the present invention further improvement lies in that, the inward flange of the circular scale and the annulus it Between be installed with gap.
Angle measurement unit of the present invention further improvement lies in that, the cover board includes:
Circular slab, the center of circle are equipped with through-hole, will be described by the center of circle that bolt wears the through-hole and the circular scale Circular slab and circular scale articulated connection;And
Connecting plate is connected between the circular slab and the annulus.
Angle measurement unit of the present invention further improvement lies in that, the connecting plate be fanning strip.
Angle measurement unit of the present invention further improvement lies in that, further include the level for being fixed on the circular scale Instrument.
Angle measurement unit of the present invention further improvement lies in that, first ruler, second ruler, it is described against Ruler and the connection ruler are equipped with scale.
Angle measurement unit of the present invention further improvement lies in that, on the annulus two sides of the mark line be equipped with vernier Ruler.
The present invention also provides a kind of measurement methods of angle measurement unit, including following measuring process:
It rotates annulus and circular scale and the first ruler of adjusting and the second ruler is perpendicular, so that the mark of the annulus Note line is aligned with the zero graduation line of the circular scale;
It will be attached at against ruler on the structural plane to be measured, so that the annulus is rotated relative to the circular scale; And
The mark line for reading the annulus corresponds to the scale of the circular scale.
The measurement method of angle measurement unit of the present invention further improvement lies in that, further include on the circular scale Fixed level meter;
Keep second ruler be vertically arranged including:
Level meter is observed, so that second ruler is vertically arranged.
The measurement method of angle measurement unit of the present invention further improvement lies in that, further include the mark on the annulus The two sides of note line set vernier scale.
The beneficial effect of angle measurement unit of the present invention and its measurement method:
Circular scale by being set in the annulus and being generally aligned in the same plane with the annulus by the present invention, using both It is articulated with the center of circle of the circular scale, the cover board of annulus is fixed on again annulus and circular scale is articulated and connected, thus Circular scale and annulus can relatively rotate.There is the first ruler on annulus, circular scale has the second ruler, will be against the end of ruler Portion, the end for connecting the end of ruler, the end of the first ruler and the second ruler are corresponding hinged.Circular scale circumferentially indicates Angle index line and with second ruler perpendicular to first ruler when mark line correspond to the circular scale Position be set as zero graduation line.It is mutual due to the first ruler and against ruler by that will be attached on structural plane to be measured against ruler In parallel, that is, the reading for reading the corresponding circular scale of mark line of annulus is the gradient, and accuracy is high, not affected by environment, It is convenient for carrying use, measurement efficiency is high.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of angle measurement unit of the present invention.
Schematic diagram when Fig. 2 is the measurement gradient of angle measurement unit of the present invention.
Fig. 3 is the annulus of angle measurement unit of the present invention and the schematic diagram of the first ruler.
Fig. 4 is the schematic diagram of the circular scale of angle measurement unit of the present invention.
Fig. 5 is the connection schematic diagram of the annulus of angle measurement unit of the present invention and the schematic diagram of circular scale.
Fig. 6 is the schematic diagram of the cover board of angle measurement unit of the present invention.
Fig. 7 is the enlarged diagram of A in Fig. 2.
Schematic diagram when Fig. 8 is the measurement wall angle of angle measurement unit of the present invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples.
Refering to fig. 1, it is shown that the structural schematic diagram of angle measurement unit of the present invention.Referring to Fig.2, showing angle of the present invention Schematic diagram when the measurement gradient of measuring device.Referring to figs. 1 and 2, angle measurement unit of the present invention includes:Annulus 10, It is formed with the first ruler 11,10 are equipped with mark line along the extended line of the center line of first ruler 11 on the annulus 12;The circular scale 20 being generally aligned in the same plane in the annulus 10 and with the annulus 10, the circular scale 20 It is formed with the second ruler 21;It is articulated with the center of circle of the circular scale 20 and is located at remote on the circular scale 20 The cover board 30 of side from the annulus 10, the cover board 30 includes the connecting plate 31 for being connected to the annulus 10, thus described Annulus 10 and the circular scale 20 mutually can be connected rotationally;For be attached on structural plane to be measured against ruler 50, it is described It is articulated and connected against the end of ruler 50 and the end of second ruler 21;And one end and the company hinged against ruler 50 Ruler is connect, the other end and the end of first ruler 11 are hinged, and first ruler 11, described supports second ruler 21 Guiding ruler 50 and the connection ruler 60 are enclosed parallelogram;The circular scale 20 circumferentially indicates angle index Line and with second ruler 21 perpendicular to first ruler 11 when the mark line 12 correspond to the circular scale 20 Position be set as zero graduation line;By being attached at described on the structural plane to be measured against ruler 50, to read the mark The reading for remembering the corresponding circular scale 20 of line 12 is the gradient.The present invention by by circular scale be set to annulus in, And be generally aligned in the same plane with annulus, using the center of circle for being not only articulated with circular scale but the cover board that is fixed on annulus by annulus and Circular scale articulated connection, so that circular scale and annulus can relatively rotate.There are the first ruler, circular scale on annulus There is the second ruler, it will be against the corresponding hinge in the end of the end of ruler, the end for connecting ruler, the end of the first ruler and the second ruler It connects.Circular scale circumferentially indicate angle index line and with the second ruler perpendicular to the first ruler when mark line correspond to The position of circular scale is set as zero graduation line.By that will be attached on structural plane to be measured against ruler, due to the first ruler and Be parallel to each other against ruler, i.e. the reading of the corresponding circular scale of mark line of reading annulus is the gradient, and accuracy is high, not by Environment influences, and is convenient for carrying use, and measurement efficiency is high.
As a better embodiment of angle measurement unit of the present invention, refering to Fig. 3, it is shown that angle measurement dress of the present invention The schematic diagram of the annulus and the first ruler set.Fig. 4 is the schematic diagram of the circular scale of angle measurement unit of the present invention.Fig. 5 is The connection schematic diagram of the schematic diagram of the annulus and circular scale of angle measurement unit of the present invention.In conjunction with shown in Fig. 1 to Fig. 5, circle The center point of ring 10 is removed a circle, circular scale 20 is set in annulus 10, and circular scale 20 and annulus 10 It is installed with gap between same plane, circular scale 20 and the inward flange of annulus 10, to facilitate rotation circular scale 20 with annulus 10, improve measurement efficiency and accuracy.
As a better embodiment of angle measurement unit of the present invention, refering to Fig. 6, it is shown that angle measurement dress of the present invention The schematic diagram for the cover board set.In conjunction with shown in Fig. 1 to Fig. 6, cover board 30 includes:Circular slab 31, the center of circle are equipped with through-hole, pass through bolt 33 Circular slab 31 and circular scale 20 are articulated and connected by the center of circle for wearing through-hole and circular scale 20;Circular scale 20 and circle Shape plate 31 can relatively rotate and connecting plate 32, is connected between circular slab 31 and annulus 10, thus will using connecting plate 32 Cover board 30 is fixedly connected with annulus 10, and since cover board 30 and circular scale 20 are articulated and connected, thus 20 He of circular scale Annulus 10 is connected and can mutually be rotated, and prevents annulus 10 and circular scale 20 from separating.
In the present embodiment, connecting plate 32 is fanning strip.Using multiple connecting plates 32 be connected to cover board 30 and annulus 10 it Between and be covered on circular scale 20, so that there are gaps between multiple connecting plates 32, can reduce to the greatest extent to limbus The scale of disk 20 blocks influence, prevents the reading that can't see scale.
As a better embodiment of angle measurement unit of the present invention, the invention also includes be fixed on circular scale 20 Level meter 70.There is bubble in level meter 70, by the position of bubble in observation level meter 70, judges the top of circular scale 20 Whether end is horizontal, to judge whether the second ruler 21 of 20 lower section of circular scale is vertically arranged, to facilitate in the measurement gradient When the second ruler 21 is adjusted at any time, with guarantee the second ruler 21 keep vertical state.In the present embodiment, the first ruler 11, the second ruler 21, against ruler 50 and connection ruler 60 be equipped with scale, thus allow for measurement of length, it is convenient and practical.Circle The two sides of the mark line 12 are equipped with vernier scale on ring 10.In reading process, whole degree is read from circular scale 20, from And the degree of 0.1 to 0.9 degree is read on vernier scale, whole degree and decimal are added as angular readings, improve the standard of measurement The precision of exactness and reading.
Refering to Fig. 7, it is shown that the enlarged diagram of A in Fig. 2.In conjunction with shown in Fig. 1 to Fig. 7, the present invention also provides one kind The measurement method of angle measurement unit, including following measuring process:
It rotates annulus 10 and circular scale 20 and the first ruler 11 of adjusting and the second ruler 21 is perpendicular, so that annulus 10 mark line is aligned with the zero graduation line of circular scale 20;
It will be attached on structural plane to be measured against ruler 50, so that annulus 10 is rotated relative to circular scale 20;And
The mark line 12 for reading annulus 10 corresponds to the scale of circular scale 20.
One better embodiment of the measurement method as angle measurement unit of the present invention, the invention also includes carve in circle Level meter 70 is fixed on scale 20;Keep the second ruler 21 be vertically arranged including:Level meter 70 is observed, the second ruler 21 is vertical Setting.
Refering to Fig. 8, it is shown that the schematic diagram when measurement wall angle of angle measurement unit of the present invention.In conjunction with Fig. 1 and Fig. 8 Shown, the present apparatus can also be used to measure the size of the inner corner trim of wall 80.In measurement, annulus 10 and circular scale are first rotated 20 and adjust the first ruler 11 and the second ruler 21 it is perpendicular so that zero quarter of the mark line of annulus 10 and circular scale 20 Line alignment is spent, then bearing against in two adjacent walls 80 against ruler 50 and connection ruler 60 by the present apparatus, reads annulus The reading of the corresponding circular scale 20 of 10 mark line.
Angle measurement unit of the present invention and its measurement method have the beneficial effect that:
Circular scale by being set in annulus and being generally aligned in the same plane with annulus by the present invention, using being both articulated with circle The center of circle of shape dial is fixed on the cover board of annulus again annulus and circular scale is articulated and connected, thus circular scale and Annulus can relatively rotate.There is the first ruler on annulus, circular scale has the second ruler, will be against the end of ruler, connection ruler The end of end, the end of the first ruler and the second ruler is corresponding hinged.Circular scale circumferentially indicate angle index line, And the position that mark line corresponds to circular scale when with the second ruler perpendicular to the first ruler is set as zero graduation line.Passing through will It is attached on structural plane to be measured against ruler, is parallel to each other due to the first ruler and against ruler, is i.e. the mark line of reading annulus is corresponding The reading of circular scale be the gradient, accuracy is high, not affected by environment, is convenient for carrying uses, measurement efficiency height.
The present invention has been described in detail with reference to the accompanying drawings, those skilled in the art can be according to upper It states and bright many variations example is made to the present invention.Thus, certain details in embodiment should not constitute limitation of the invention, this Invention will be using the range that the appended claims define as protection scope of the present invention.

Claims (10)

1. a kind of angle measurement unit, which is characterized in that including:
Annulus, is formed with the first ruler, and the extended line on the annulus along the center line of first ruler is equipped with label Line;
The circular scale being generally aligned in the same plane in the annulus and with the annulus, one bodily form of circular scale At there is the second ruler;
It is articulated with the center of circle of the circular scale and is located at the lid of the side on the circular scale far from the annulus Plate, the cover board include the connecting plate for being connected to the annulus, so that the annulus and the circular scale can be rotated mutually Ground connection;
For be attached on structural plane to be measured against ruler, it is described hingedly to connect against the end of ruler and the end of second ruler It connects;And
One end and the connection ruler hinged against ruler, the other end and the end of first ruler are hinged, and described first It is ruler, second ruler, described against ruler and the connection ruler is enclosed parallelogram;
The circular scale circumferentially indicate angle index line and with second ruler perpendicular to first ruler when The position that the mark line corresponds to the circular scale is set as zero graduation line;By by it is described be attached at against ruler it is described On structural plane to be measured, so that the reading for reading the corresponding circular scale of the mark line is the gradient.
2. angle measurement unit as described in claim 1, which is characterized in that the inner edge of the circular scale and the annulus Gap is installed between edge.
3. angle measurement unit as described in claim 1, which is characterized in that the cover board includes:
Circular slab, the center of circle are equipped with through-hole, wear the center of circle of the through-hole and the circular scale for the circle by bolt Plate and circular scale articulated connection;And
Connecting plate is connected between the circular slab and the annulus.
4. angle measurement unit as claimed in claim 3, which is characterized in that the connecting plate is fanning strip.
5. angle measurement unit as described in claim 1, which is characterized in that further include the water for being fixed on the circular scale Level.
6. angle measurement unit as described in claim 1, which is characterized in that first ruler, second ruler, described Scale is equipped with against ruler and the connection ruler.
7. angle measurement unit as described in claim 1, which is characterized in that the two sides of the mark line are equipped on the annulus Vernier scale.
8. a kind of measurement method of angle measurement unit as described in claim 1, which is characterized in that including measuring step as follows Suddenly:
It rotates annulus and circular scale and the first ruler of adjusting and the second ruler is perpendicular, so that the mark line of the annulus It is aligned with the zero graduation line of the circular scale;
It will be attached at against ruler on the structural plane to be measured, so that the annulus is rotated relative to the circular scale;And
The mark line for reading the annulus corresponds to the scale of the circular scale.
9. the measurement method of angle measurement unit as claimed in claim 8, which is characterized in that further include in the limbus Level meter is fixed on disk;
Keep second ruler be vertically arranged including:
Level meter is observed, so that second ruler is vertically arranged.
10. the measurement method of angle measurement unit as claimed in claim 8, which is characterized in that further include on the annulus The two sides of the mark line set vernier scale.
CN201810600428.8A 2018-06-12 2018-06-12 Angle measuring device and measuring method thereof Active CN108827241B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810600428.8A CN108827241B (en) 2018-06-12 2018-06-12 Angle measuring device and measuring method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810600428.8A CN108827241B (en) 2018-06-12 2018-06-12 Angle measuring device and measuring method thereof

Publications (2)

Publication Number Publication Date
CN108827241A true CN108827241A (en) 2018-11-16
CN108827241B CN108827241B (en) 2024-03-12

Family

ID=64144787

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810600428.8A Active CN108827241B (en) 2018-06-12 2018-06-12 Angle measuring device and measuring method thereof

Country Status (1)

Country Link
CN (1) CN108827241B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111121601A (en) * 2020-01-19 2020-05-08 中国建筑第五工程局有限公司 A kind of concrete yin and yang angle formwork squareness detection tool and application method thereof
CN116989744A (en) * 2023-08-02 2023-11-03 北京城建集团有限责任公司 High-altitude pipeline slope measurement device

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11241902A (en) * 1998-02-25 1999-09-07 Sumitomo Chem Co Ltd Angle inspection instrument
KR20110133639A (en) * 2010-06-06 2011-12-14 조동혁 Digital angle measuring sensor and device for measuring the inclination using a sensing pad in which current flows through a material that maintains a horizontal plane by flowing
CN203981097U (en) * 2014-07-22 2014-12-03 马晴川 A kind of practical vernier angle measuring instrument
CN204202510U (en) * 2014-10-30 2015-03-11 中国北车集团大连机车车辆有限公司 Multiple use angle protractor
CN204679018U (en) * 2015-05-28 2015-09-30 党琪 A kind of angle measurement equipment
CN204902745U (en) * 2015-07-16 2015-12-23 辽河石油勘探局 Combined angle scale
CN205537407U (en) * 2016-04-08 2016-08-31 中冶建工集团有限公司 A multifunctional measuring chi for in construction
CN208313287U (en) * 2018-06-12 2019-01-01 中国建筑第八工程局有限公司 Angle measurement unit

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11241902A (en) * 1998-02-25 1999-09-07 Sumitomo Chem Co Ltd Angle inspection instrument
KR20110133639A (en) * 2010-06-06 2011-12-14 조동혁 Digital angle measuring sensor and device for measuring the inclination using a sensing pad in which current flows through a material that maintains a horizontal plane by flowing
CN203981097U (en) * 2014-07-22 2014-12-03 马晴川 A kind of practical vernier angle measuring instrument
CN204202510U (en) * 2014-10-30 2015-03-11 中国北车集团大连机车车辆有限公司 Multiple use angle protractor
CN204679018U (en) * 2015-05-28 2015-09-30 党琪 A kind of angle measurement equipment
CN204902745U (en) * 2015-07-16 2015-12-23 辽河石油勘探局 Combined angle scale
CN205537407U (en) * 2016-04-08 2016-08-31 中冶建工集团有限公司 A multifunctional measuring chi for in construction
CN208313287U (en) * 2018-06-12 2019-01-01 中国建筑第八工程局有限公司 Angle measurement unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111121601A (en) * 2020-01-19 2020-05-08 中国建筑第五工程局有限公司 A kind of concrete yin and yang angle formwork squareness detection tool and application method thereof
CN116989744A (en) * 2023-08-02 2023-11-03 北京城建集团有限责任公司 High-altitude pipeline slope measurement device

Also Published As

Publication number Publication date
CN108827241B (en) 2024-03-12

Similar Documents

Publication Publication Date Title
CN208398849U (en) A kind of cracking rudder face degree of bias measuring device based on gravity
CN108827241A (en) Angle measurement unit and its measurement method
CN102393192B (en) Dial plate type protractor and using method thereof
CN208984002U (en) A kind of rotary opening number reading bevel protractor
CN208313287U (en) Angle measurement unit
CN207670624U (en) A kind of radar water gauge detection device
CN109682352A (en) A kind of ship structural component angle of bank measurement adjustment device and its measurement method of adjustment
CN109000616A (en) External corner measuring device and its measurement method
CN108278993A (en) Total reflection prism laser ranging total powerstation instrument height measuring system and application method
CN212206040U (en) Measuring device applied to horizontal displacement monitoring collimation line method of hydraulic structure
CN204007388U (en) A kind of instrument of measuring crucible size
CN108120423A (en) Prismosphere measures auxiliary tool
CN208952865U (en) A kind of bending angle measuring device
CN208520311U (en) External angle measuring device
CN209372078U (en) A kind of geologic compass
CN205300593U (en) Automatic keep vertically engineering survey sighting rod
CN204679035U (en) A kind of architectural design special measurement device
CN209371953U (en) Coil end length-measuring appliance
CN102374858B (en) Underground angle measuring and calculating instrument
CN108363067B (en) Standard plane laser ranging total station instrument height measurement system and use method
CN207649600U (en) A kind of high-precision universal spirit level
CN208885030U (en) A kind of engineering construction beam slab levelness detecting device
CN106908030A (en) A kind of architectural design special measurement device
CN208506243U (en) A kind of automatic leveling handheld measurement tool
CN206847538U (en) A kind of detection rule for verticality

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant