CN110030982A - A kind of building engineering quality supervision door and window detection level ruler - Google Patents
A kind of building engineering quality supervision door and window detection level ruler Download PDFInfo
- Publication number
- CN110030982A CN110030982A CN201910371779.0A CN201910371779A CN110030982A CN 110030982 A CN110030982 A CN 110030982A CN 201910371779 A CN201910371779 A CN 201910371779A CN 110030982 A CN110030982 A CN 110030982A
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- China
- Prior art keywords
- ruler
- level
- horizontal
- door
- level ruler
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Classifications
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- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
- G01C9/18—Measuring inclination, e.g. by clinometers, by levels by using liquids
- G01C9/24—Measuring inclination, e.g. by clinometers, by levels by using liquids in closed containers partially filled with liquid so as to leave a gas bubble
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Door And Window Frames Mounted To Openings (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The present invention relates to measuring device technical fields, and disclose a kind of building engineering quality supervision door and window detection level ruler, including folding connection piece, expansion plate and first level ruler, the right side of the folding connection piece is fixedly connected with connecting plate, the inside of the connecting plate offers sliding cavity, the left side of the first level ruler is fixedly connected with clamping seat, the internal slide connection of the clamping seat and sliding cavity.Building engineering quality supervision door and window detection level ruler, by the cooperation of connecting node and support plate and carrying bolt so that first level ruler and the second horizontal ruler are able to maintain horizontality when strutting, avoiding the occurrence of inclination causes measurement result to have error, the horizontal ruler is made to be able to carry out folding in the case where not using by folding connection piece, so that the horizontal ruler is easy to carry, first level ruler is allowed to remove exclusive use from connecting plate by the cooperation of sliding cavity and clamping seat.
Description
Technical field
The present invention relates to measuring device technical field, specially a kind of building engineering quality supervision door and window detection level
Ruler.
Background technique
Horizontal ruler is the principle using liquid level, directly displays angular displacement with air level, measures measured surface with respect to water
Prosposition sets, plumb position, obliquity departure degree a kind of measurement instrument, this horizontal ruler can be used for short distance measurement,
It can be used to measure at a distance again, also solving existing level instrument can only measure in open ground, the difficult disadvantage of narrow place measurement, and
Measurement is accurate, and low cost is easy to carry, economic and practical.
Horizontal ruler used at present compares simple and crude, needs to go whether placement is horizontal to horizontal ruler according to the subjective consciousness of people
Judged, when the levelness to some door and windows measures, can not determine and no level is placed, and then cause to survey
There is deviation in the result of amount, and the width value and height value of some door and windows are higher, can not carry out when in use to horizontal ruler horizontal solid
It is fixed, and horizontal ruler can not be placed when the width value of door and window is smaller, it is also necessary to shorter horizontal ruler is used, thus
It needs to measure using different horizontal rulers, it is not convenient enough to carry.
Summary of the invention
The present invention provides a kind of building engineering quality supervision door and window detection level ruler, have can be folded it is flexible,
Detachable measurement, can carry out the advantages of sliding measures, level can not be carried out during use by solving traditional horizontal ruler
Positioning and according to the width of door and window and it can not dare to gamble the problem of length of horizontal ruler is adjusted.
The invention provides the following technical scheme: a kind of building engineering quality supervision door and window detection level ruler, including fold
Connector, expansion plate and first level ruler, the right side of the folding connection piece are fixedly connected with connecting plate, the connecting plate
Inside offers sliding cavity, and the left side of the first level ruler is fixedly connected with clamping seat, the clamping seat and sliding cavity
Internal slide connection, the inside of the first level ruler offer the first placing groove, the fixed peace in the inside of first placing groove
Equipped with vertical air level, the inside of the first level ruler offers the second placing groove, and the inside of second placing groove is fixed
Horizontal levelling bubble is installed, the inside of the first level ruler offers third placing groove, and the inside of the third placing groove is solid
There are the first magnetic stripe, the right side of the first level ruler in Dingan County equipped with inclination air level, the bottom fixed bonding of the first level ruler
Side is fixedly installed with first level idler wheel, and the left side of the folding connection piece is fixedly connected with the second horizontal ruler, and described
The front of two horizontal rulers is fixedly installed with connecting node, and the front of the connecting node is movably installed with support plate, the support
Front screw thread on the left of plate is equipped with carrying bolt, and the bottom fixed bonding of second horizontal ruler has the second magnetic stripe, the folding
The bottom of folded connector is fixedly connected with support rod, and the bottom thread of the support rod is connected with screw rod, the bottom of the screw rod
It is fixedly installed with hand steered support rod, the inside of second horizontal ruler offers the movable chamber matched with expansion plate, described to stretch
The side of contracting plate offers card slot, and the front of second horizontal ruler offers regulation chamber, and the side activity of the regulation chamber connects
It is connected to slide, the internal whorl of the slide is equipped with fastened screw rod, and the fastened screw rod is located at one on the outside of the second horizontal ruler
End is fixedly connected with handle, and the other end of the fastened screw rod through card slot and extends to the inside of card slot and is fixedly connected with card
Seat, the left side of the expansion plate is fixedly connected with the second horizontal roller.
Preferably, the screw hole matched with carrying bolt is offered on the first level ruler.
Preferably, the length value of the regulation chamber is slightly larger than the length value of expansion plate, and the diameter value of the deck is slightly larger than
The opening width value of card slot.
Preferably, the vertical air level, horizontal levelling bubble and inclination air level on first level ruler from left to right
It is sequentially distributed.
Preferably, the tilt angle of the inclination air level is 45 °.
Preferably, the quantity of the first level idler wheel is two, and the quantity of second horizontal roller is two, two
The first level idler wheel and two second horizontal rollers are symmetrical axial symmetry point with the horizontal central line of folding connection piece
Cloth.
Preferably, the width value of second horizontal ruler is slightly larger than the width value of first level ruler, second horizontal ruler
Length value be slightly larger than first level ruler length value.
Preferably, first magnetic stripe and the second magnetic stripe are located at first level ruler and the back of the second horizontal ruler is equal
It is fixedly connected with magnetic sheet.
The present invention have it is following the utility model has the advantages that
1, building engineering quality supervision door and window detection level ruler passes through matching for connecting node and support plate and carrying bolt
It closes so that first level ruler and the second horizontal ruler are able to maintain horizontality when strutting, avoiding the occurrence of inclination leads to measurement result
There is error, make the horizontal ruler be able to carry out folding in the case where not using by folding connection piece, so that the horizontal ruler is taken
Band is convenient, allows first level ruler to remove exclusive use from connecting plate by the cooperation of sliding cavity and clamping seat.
2, building engineering quality supervision door and window detection level ruler, by the cooperation of hand steered support rod and support rod so that
Horizontal ruler people when measuring higher door and window need not can detect by ladder, pass through first level idler wheel and second
Whether on a vertical line horizontal roller can measure the side wall of door and window from top to bottom, and then to the vertical degree of jamb wall
It measures.
3, building engineering quality supervision door and window detection level ruler, makes people exist by the first magnetic stripe and the second magnetic stripe
When measuring, horizontal ruler can be adsorbed on door and window at any time, air level is observed convenient for people, passes through fastened screw rod
Cooperation with slide enables expansion plate to be fixed in any position of the second horizontal ruler, and then can make the horizontal ruler
The door and window of different in width is detected.
Detailed description of the invention
Fig. 1 is structure of the invention front view；
Fig. 2 is the second horizontal ruler of structure of the invention sectional side view；
Fig. 3 connect top view with first level ruler for structure of the invention connecting plate.
In figure: 1, folding connection piece；2, support plate；3, connecting node；4, regulate and control chamber；5, handle；6, expansion plate；7, second
Horizontal roller；8, the second magnetic stripe；9, support rod；10, screw rod；11, hand steered support rod；12, vertical air level；13, it second places
Slot；14, horizontal levelling bubble；15, third placing groove；16, air level is tilted；17, the first magnetic stripe；18, first level idler wheel；19,
First placing groove；20, first level ruler；21, carrying bolt；22, connecting plate；23, the second horizontal ruler；24, movable chamber；25, sliding
Seat；26, fastened screw rod；27, card slot；28, deck；29, sliding cavity；30, it is clamped seat.
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.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1-3, a kind of building engineering quality supervision door and window detection level ruler, including it is folding connection piece 1, flexible
Plate 6 and first level ruler 20 make the horizontal ruler be able to carry out folding in the case where not using, make by folding connection piece 1
The horizontal ruler it is easy to carry, the right side of folding connection piece 1 is fixedly connected with connecting plate 22, and the inside of connecting plate 22 offers
Sliding cavity 29, the left side of first level ruler 20 are fixedly connected with clamping seat 30, are clamped the internal slide of seat 30 and sliding cavity 29
Connection, by the cooperation of sliding cavity 29 and clamping seat 30 first level ruler 20 is removed from connecting plate 22 individually makes
With the inside of first level ruler 20 offers the first placing groove 19, and the inside of the first placing groove 19 is fixedly installed with vertical level
Bubble 12, the inside of first level ruler 20 offers the second placing groove 13, and the inside of the second placing groove 13 is fixedly installed with horizontal water
Quasi- bubble 14, the inside of first level ruler 20 offers third placing groove 15, and the inside of third placing groove 15 is fixedly installed with inclination
Air level 16, vertical air level 12, horizontal levelling bubble 14 and inclination air level 16 on first level ruler 20 from left to right according to
Secondary distribution, the tilt angle of inclination air level 16 are 45 °, and the bottom fixed bonding of first level ruler 20 has the first magnetic stripe 17, the
The right side of one horizontal ruler 20 is fixedly installed with first level idler wheel 18, and the left side of folding connection piece 1 is fixedly connected with second
Horizontal ruler 23, the width value of the second horizontal ruler 23 are slightly larger than the width value of first level ruler 20, the length value of the second horizontal ruler 23
Slightly larger than the length value of first level ruler 20, the front of the second horizontal ruler 23 is fixedly installed with connecting node 3, connecting node 3
Front is movably installed with support plate 2, and the front screw thread in 2 left side of support plate is equipped with carrying bolt 21, opens on first level ruler 20
Equipped with the screw hole matched with carrying bolt 21, by the cooperation of connecting node 3 and support plate 2 and carrying bolt 21 so that
One horizontal ruler 20 and the second horizontal ruler 23 are able to maintain horizontality when strutting, and avoiding the occurrence of inclination causes measurement result wrong
Difference, the bottom fixed bonding of the second horizontal ruler 23 have the second magnetic stripe 8, by the first magnetic stripe 17 and the second magnetic stripe 8 people are existed
When measuring, horizontal ruler can be adsorbed on door and window at any time, air level is observed convenient for people, the first magnetic stripe 17 with
And second magnetic stripe 8 be located at first level ruler 20 and the back of the second horizontal ruler 23 is fixedly connected to magnetic sheet, magnetic sheet is advantageous
In directly horizontal ruler is adsorbed on door and window during use, the bottom of folding connection piece 1 is fixedly connected with support rod 9,
The bottom thread of support rod 9 is connected with screw rod 10, and the bottom of screw rod 10 is fixedly installed with hand steered support rod 11, passes through hand steered support
The cooperation of bar 11 and support rod 9 is so that horizontal ruler people when measuring higher door and window need not can examine by ladder
It surveys, the inside of the second horizontal ruler 23 offers the movable chamber 24 matched with expansion plate 6, and the side of expansion plate 6 offers card slot
27, the front of the second horizontal ruler 23 offers regulation chamber 4, and the length value of regulation chamber 4 is slightly larger than the length value of expansion plate 6, regulation
The side of chamber 4 is connected with slide 25, and the internal whorl of slide 25 is equipped with fastened screw rod 26, by fastened screw rod 26 and slides
The cooperation of seat 25 enables expansion plate 6 to be fixed in any position of the second horizontal ruler 23, and then can make the level
Ruler detects the door and window of different in width, and one end that fastened screw rod 26 is located at 23 outside of the second horizontal ruler is fixedly connected with handle
5, the other end of fastened screw rod 26 through card slot 27 and extends to the inside of card slot 27 and is fixedly connected with deck 28, deck 28
Diameter value is slightly larger than the opening width value of card slot 27, and the left side of expansion plate 6 is fixedly connected with the second horizontal roller 7, the first water
The quantity of flat roller 18 is two, and the quantity of the second horizontal roller 7 is two, two first level idler wheels 18 and two the second water
Flat roller 7 is symmetrical as symmetry axis using the horizontal central line of folding connection piece 1, horizontal by first level idler wheel 18 and second
Whether on a vertical line idler wheel 7 can measure the side wall of door and window from top to bottom, so to the vertical degree of jamb wall into
Row measurement.
First level ruler 20 and the second horizontal ruler 23 are turned in same horizontal line, support plate 2 are surrounded by working principle
Connecting node 3 is rotated, and then tightens carrying bolt 21 and the other end of support plate 2 is fixed, according to the width of door and window
It spends to adjust the position of expansion plate 6, slide 25 follows it to be moved on regulation chamber 4 when pulling expansion plate 6, passes through
Handle 5 drives fastened screw rod 26 to be moved, and then drives deck 28 to act in card slot 27 and expansion plate 6 is fixed, so
The state for observing horizontal levelling bubble 14 afterwards, when the door and window for needing to measure is higher, directly by the screw rod 10 on hand steered support rod 11
It is attached with support rod 9, hand steered support rod 11 lifts horizontal ruler at the position of measurement, when needing to be used alone first
When horizontal ruler 20, it is only necessary to extract clamping seat 30 out of sliding cavity 29 out, when whether the side wall for needing to measure door and window is horizontal
When, first level idler wheel 18 and the second horizontal roller 7 are directly close to side wall, then moved up and down.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of building engineering quality supervision door and window detection level ruler, including folding connection piece (1), expansion plate (6) and first
Horizontal ruler (20), it is characterised in that: the right side of the folding connection piece (1) is fixedly connected with connecting plate (22), the connection
The inside of plate (22) offers sliding cavity (29), and the left side of the first level ruler (20) is fixedly connected with clamping seat (30),
Clamping seat (30) connect with the internal slide of sliding cavity (29), and the inside of the first level ruler (20) offers first and puts
It sets slot (19), the inside of first placing groove (19) is fixedly installed with vertical air level (12), the first level ruler (20)
Inside offer the second placing groove (13), the inside of second placing groove (13) is fixedly installed with horizontal levelling bubble (14),
The inside of the first level ruler (20) offers third placing groove (15), and the inside of the third placing groove (15) is fixedly mounted
Have inclination air level (16), the bottom fixed bonding of the first level ruler (20) has the first magnetic stripe (17), the first level
The right side of ruler (20) is fixedly installed with first level idler wheel (18), and the left side of the folding connection piece (1) is fixedly connected with
The front of second horizontal ruler (23), second horizontal ruler (23) is fixedly installed with connecting node (3), the connecting node (3)
Front be movably installed with support plate (2), the front screw thread on the left of the support plate (2) is equipped with carrying bolt (21), described
The bottom fixed bonding of second horizontal ruler (23) has the second magnetic stripe (8), and the bottom of the folding connection piece (1) is fixedly connected with branch
The bottom thread of strut (9), the support rod (9) is connected with screw rod (10), and the bottom of the screw rod (10) is fixedly installed with hand
It helps support rod (11), the inside of second horizontal ruler (23) offers the movable chamber (24) matched with expansion plate (6), described
The side of expansion plate (6) offers card slot (27), and the front of second horizontal ruler (23) offers regulation chamber (4), the tune
The side of control chamber (4) is connected with slide (25), and the internal whorl of the slide (25) is equipped with fastened screw rod (26), described
One end that fastened screw rod (26) is located on the outside of the second horizontal ruler (23) is fixedly connected with handle (5), the fastened screw rod (26)
The other end is through card slot (27) and extends to the inside of card slot (27) and is fixedly connected with deck (28), the expansion plate (6)
Left side is fixedly connected with the second horizontal roller (7).
2. a kind of building engineering quality supervision according to claim 1 door and window detection level ruler, it is characterised in that: described
The screw hole matched with carrying bolt (21) is offered on first level ruler (20).
3. a kind of building engineering quality supervision according to claim 1 door and window detection level ruler, it is characterised in that: described
The length value for regulating and controlling chamber (4) is slightly larger than the length value of expansion plate (6), and the diameter value of the deck (28) is slightly larger than card slot (27)
Opening width value.
4. a kind of building engineering quality supervision according to claim 1 door and window detection level ruler, it is characterised in that: described
Vertical air level (12), horizontal levelling bubble (14) and inclination air level (16) on first level ruler (20) from left to right successively
Distribution.
5. a kind of building engineering quality supervision according to claim 1 door and window detection level ruler, it is characterised in that: described
The tilt angle for tilting air level (16) is 45 °.
6. a kind of building engineering quality supervision according to claim 1 door and window detection level ruler, it is characterised in that: described
The quantity of first level idler wheel (18) is two, and the quantity of second horizontal roller (7) is two, two first levels
Idler wheel (18) and two second horizontal rollers (7) are symmetrical as symmetry axis using the horizontal central line of folding connection piece (1).
7. a kind of building engineering quality supervision according to claim 1 door and window detection level ruler, it is characterised in that: described
The width value of second horizontal ruler (23) is slightly larger than the width value of first level ruler (20), the length value of second horizontal ruler (23)
Slightly larger than the length value of first level ruler (20).
8. a kind of building engineering quality supervision according to claim 1 door and window detection level ruler, it is characterised in that: described
First magnetic stripe (17) and the second magnetic stripe (8) are located at first level ruler (20) and the back of the second horizontal ruler (23) is fixed
It is connected with magnetic sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910371779.0A CN110030982B (en) | 2019-05-06 | 2019-05-06 | Door and window detects level bar for building engineering quality supervision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910371779.0A CN110030982B (en) | 2019-05-06 | 2019-05-06 | Door and window detects level bar for building engineering quality supervision |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110030982A true CN110030982A (en) | 2019-07-19 |
| CN110030982B CN110030982B (en) | 2021-07-06 |
Family
ID=67241286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910371779.0A Active CN110030982B (en) | 2019-05-06 | 2019-05-06 | Door and window detects level bar for building engineering quality supervision |
Country Status (1)
| Country | Link |
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| CN (1) | CN110030982B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112857319A (en) * | 2021-01-30 | 2021-05-28 | 山东科技职业学院 | Door and window detects level bar for building engineering quality supervision |
| CN112978521A (en) * | 2021-05-06 | 2021-06-18 | 孙浩 | Land surveying and mapping survey line tightening equipment based on electronic information technology |
| CN113899274A (en) * | 2021-10-15 | 2022-01-07 | 浙江工业大学 | Building slope is measured and is used survey and drawing chi |
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| CA2276880C (en) * | 1998-07-27 | 2002-07-30 | Richard J. Moe | Multi-purpose measuring tool |
| CN2577247Y (en) * | 2002-10-08 | 2003-10-01 | 庄成荣 | Multifunction combined level |
| CN104075693A (en) * | 2014-07-04 | 2014-10-01 | 宁波美成生物科技有限公司 | Triangle leveling instrument |
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| CN206656765U (en) * | 2017-04-28 | 2017-11-21 | 金志刚 | A kind of combination type multifunction water leveling ruler |
| KR20170127886A (en) * | 2016-05-13 | 2017-11-22 | 서영대 | Multipurpose omitted |
| CN109341480A (en) * | 2018-10-17 | 2019-02-15 | 安徽省卓创信息科技服务有限公司 | A kind of construction engineering quality detection device |
| CN208795087U (en) * | 2018-11-16 | 2019-04-26 | 王华良 | A kind of Project Supervising detection device |
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2019
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|---|---|---|---|---|
| CA2276880C (en) * | 1998-07-27 | 2002-07-30 | Richard J. Moe | Multi-purpose measuring tool |
| CN2577247Y (en) * | 2002-10-08 | 2003-10-01 | 庄成荣 | Multifunction combined level |
| CN104075693A (en) * | 2014-07-04 | 2014-10-01 | 宁波美成生物科技有限公司 | Triangle leveling instrument |
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| KR20170127886A (en) * | 2016-05-13 | 2017-11-22 | 서영대 | Multipurpose omitted |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112857319A (en) * | 2021-01-30 | 2021-05-28 | 山东科技职业学院 | Door and window detects level bar for building engineering quality supervision |
| CN112978521A (en) * | 2021-05-06 | 2021-06-18 | 孙浩 | Land surveying and mapping survey line tightening equipment based on electronic information technology |
| CN113899274A (en) * | 2021-10-15 | 2022-01-07 | 浙江工业大学 | Building slope is measured and is used survey and drawing chi |
| CN113899274B (en) * | 2021-10-15 | 2024-06-07 | 浙江工业大学 | Survey and drawing ruler for building inclination measurement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110030982B (en) | 2021-07-06 |
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Inventor after: Hong Xiaodong Inventor after: Ye Jianwu Inventor after: Qiu Chenmiao Inventor after: Luo Jianzhong Inventor after: Luo Zegun Inventor before: Luo Jianzhong Inventor before: Luo Zegun |
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Effective date of registration: 20210513 Address after: 325800 east side of the first floor of building a, 66 Yongjiang Road, Wenzhou Economic and Technological Development Zone, Longwan District, Wenzhou City, Zhejiang Province Applicant after: Wenzhou Zhongxu Construction Engineering Quality Testing Center Co.,Ltd. Address before: 050400 building 6, lishuiwan community, Pingshan County, Shijiazhuang City, Hebei Province Applicant before: Luo Jianzhong |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 325000 East of Floor 1, Building A, No. 66 Yongjiang Road, Wenzhou Economic and Technological Development Zone, Longwan District, Wenzhou City, Zhejiang Province Patentee after: Zhejiang Chenxu Testing Technology Co.,Ltd. Address before: 325800 east side of the first floor of building a, 66 Yongjiang Road, Wenzhou Economic and Technological Development Zone, Longwan District, Wenzhou City, Zhejiang Province Patentee before: Wenzhou Zhongxu Construction Engineering Quality Testing Center Co.,Ltd. |