CN109557289A - A kind of plate of novel measurement cement slurry divergence - Google Patents
A kind of plate of novel measurement cement slurry divergence Download PDFInfo
- Publication number
- CN109557289A CN109557289A CN201811468396.7A CN201811468396A CN109557289A CN 109557289 A CN109557289 A CN 109557289A CN 201811468396 A CN201811468396 A CN 201811468396A CN 109557289 A CN109557289 A CN 109557289A
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- bottom plate
- plate
- cement slurry
- screw rod
- slump
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- 239000004568 cement Substances 0.000 title claims abstract description 36
- 239000002002 slurry Substances 0.000 title claims abstract description 36
- 238000005259 measurement Methods 0.000 title claims abstract description 19
- 230000007246 mechanism Effects 0.000 claims abstract description 39
- 210000002683 foot Anatomy 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000012372 quality testing Methods 0.000 abstract description 3
- 239000004035 construction material Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 102100032352 Leukemia inhibitory factor Human genes 0.000 description 1
- 108090000581 Leukemia inhibitory factor Proteins 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a kind of plates of novel measurement cement slurry divergence, are related to construction material detection technology field.The present invention includes bottom plate, and bottom plate is a square plate, and the lower surface edge of bottom plate is uniformly equipped with adjustable feet, and the upper surface of bottom plate is provided with air level；The upper surface middle part of bottom plate is carved with a round wires equal with slump cylinder bottom end disc diameter, and orthogonal two graduation mark is carved in the upper surface of bottom plate, and being evenly distributed in the upper surface for bottom plate is equipped with several clamping mechanisms, and the upper surface of bottom plate is equipped with a Ti Tong mechanism；Clamping mechanism includes first wire nut, the first screw rod and slip ring；First wire nut is fixedly mounted on the upper surface of bottom plate.The present invention by adjusting level board levelness, then slump cylinder is fixed by clamping mechanism, Ti Tong mechanism is finally reused to take out slump cylinder, it facilitates people's reading and calculates the slump and divergence of cement slurry, improve the authenticity of cement slurry slump and divergence quality testing.
Description
Technical field
The invention belongs to construction material detection technology fields, more particularly to a kind of the flat of novel measurement cement slurry divergence
Plate.
Background technique
Currently, indispensable participant is exactly cement slurry during building, municipal administration, road and bridge construction, and cement slurry uses
It is to test its slump or divergence before, guarantees the quality of cement slurry with this, is provided for the life and work of people
Safety guarantee.
But in practice, many test process are not able to satisfy code requirement, such as test levelness, slump or the expansion of bottom plate
The measurement precision of the latitude of emulsion and the speed of withdrawing slump cylinder and firmly the problems such as the quality testing of cement slurry will all be caused
Deviation effects, therefore the plate of novel measurement cement slurry divergence that requires study a kind of improves the reliable of cement slurry quality testing
Property.
Summary of the invention
The purpose of the present invention is to provide a kind of plates of novel measurement cement slurry divergence, by adjusting the water of level board
Pingdu, is then fixed slump cylinder by clamping mechanism, is finally reused Ti Tong mechanism and is taken out slump cylinder, convenient
People's reading and the slump and divergence for calculating cement slurry, the quality detection device for solving existing cement slurry can not be true
The problem of real effective measurement cement slurry slump and divergence.
In order to solve the above technical problems, the present invention is achieved by the following technical solutions:
The present invention is a kind of plate of novel measurement cement slurry divergence, including bottom plate, and the bottom plate is a square plate,
The lower surface edge of the bottom plate is uniformly equipped with several adjustable feets, and the upper surface of the bottom plate is provided with air level；It is described
The upper surface middle part of bottom plate is carved with a round wires equal with slump cylinder bottom end disc diameter, and phase is carved in the upper surface of the bottom plate
Mutually two vertical graduation marks, being evenly distributed in the upper surface for the bottom plate are equipped with several clamping mechanisms, the upper surface installation of the bottom plate
You Yititong mechanism；
The clamping mechanism includes first wire nut, the first screw rod and slip ring；The first wire nut is fixedly mounted on bottom plate
Upper surface, and be combined with one first screw rod in the first wire nut, graduation mark, and described first be coated on first screw rod
A slip ring is rotatably connected on screw rod；The upper surface of the slip ring and bottom plate forms and is slidably connected；
The Ti Tong mechanism includes the first mounting plate, the second mounting plate, the second screw, the second screw rod and snap-gauge；Described
One mounting plate is mounted on the upper surface of bottom plate by the first connecting column, and second mounting plate is mounted on by the second connecting column
The upper surface of one frame body；Extend through the second screw in the middle part of first mounting plate and the second mounting plate, two described second
One second screw rod is combined in screw；The bottom end of second screw rod is rotatably connected to a strip connecting plate；The bar shaped connection
The both ends of plate are sliding combined with snap-gauge respectively；Arc port compatible with side all at the top of slump cylinder is provided on the snap-gauge,
And two the arc port be oppositely arranged.
Further, the upper surface of the bottom plate is equipped with height measuring mechanism；The height measuring mechanism includes scale
Column, ladder bushing and measuring scale；The upper surface of the bottom plate is symmetrically installed with scale column, is slidably matched respectively on the scale column
Have a ladder bushing, the ladder bushing is fixed on scale column by clamping screw, all sides of a ladder bushing with
One end of measuring scale forms rotation connection, and the other end of the measuring scale is mutually overlapped with another ladder bushing.
Further, the graduation mark is overlapped with the diagonal line of bottom plate, and the intersection point of two graduation marks is zero graduation, institute
The intersection point for stating graduation mark is overlapped with the center of circle of round wires.
Further, the top surface edge of the bottom plate is uniformly provided with several sliding slots；The sliding slot and it is fixed on cunning
Sliding block on rotating ring is slidably matched.
Further, connecting plate, the top of the connecting plate and strip connecting plate are fixed on an end face of the snap-gauge
End forms limit sliding.
Further, being evenly distributed in the upper surface for the bottom plate is provided with several round holes, the round hole and the first connecting column
Bottom end forms grafting.
The invention has the following advantages:
1, the present invention and makes slump by clamping mechanism by adjustable feet and air level come the levelness of regulating base board
Degree cylinder is aligned with round wires, thus facilitate people read and calculate by graduation mark and height measuring mechanism the slump of cement slurry with
Divergence avoids extraneous factor influence caused by cement slurry quality measurements, and aspect people read and operate,
Improve the reliability of testing result.
2, the present invention is stuck on all sides at the top of slump cylinder by the arc port on snap-gauge, then uniform rotation second
Screw rod makes the second screw rod that snap-gauge be driven at the uniform velocity to rise, and snap-gauge will rise with the handle of slump cylinder, can effectively guarantee to collapse
Speed and strength direction when the extraction of degree of falling cylinder avoids manual operation from causing the inclination or collapsing of molding cement slurry, causes to examine
The distortion of measured data further improves the authenticity and reliability of cement slurry slump and divergence detection.
Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to embodiment required
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is a kind of structural schematic diagram of the plate of novel measurement cement slurry divergence of the present invention；
Fig. 2 is the structural schematic diagram of bottom plate of the invention；
Fig. 3 is the scheme of installation of clamping mechanism and height measuring mechanism of the invention on bottom plate；
Fig. 4 is the structural schematic diagram of Ti Tong mechanism of the invention；
In attached drawing, parts list represented by the reference numerals are as follows:
1- bottom plate, 2- clamping mechanism, 3- Ti Tong mechanism, 4- height measuring mechanism, feet that 101- is adjustable, 102- air level,
103- round wires, 104- graduation mark, 105- sliding slot, 106- round hole, 201- first wire nut, the first screw rod of 202-, 203- slip ring,
The first mounting plate of 301-, the second mounting plate of 302-, the second screw of 303-, the second screw rod of 304-, 305- snap-gauge, the connection of 306- first
Column, the second connecting column of 307-, 308- strip connecting plate, 401- scale column, 402- ladder bushing, 403- measuring scale.
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 all other
Embodiment shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " setting ", "ON", "upper", "lower", " in ", "top",
Indicating positions or the positional relationship such as "inner", " all sides ", are merely for convenience of description of the present invention and simplification of the description, rather than indicate
Or imply that signified component or element must have a particular orientation, it is constructed and operated in a specific orientation, therefore cannot understand
For limitation of the present invention.
As shown in Figure 1-3, the present invention is a kind of plate of novel measurement cement slurry divergence, including bottom plate 1, bottom plate 1 are
One square plate, the lower surface edge of bottom plate 1 are uniformly installed there are four adjustable feet 101, and the upper surface of bottom plate 1 is provided with level
Bubble 102；The upper surface middle part of bottom plate 1 is carved with a round wires 103 equal with slump cylinder bottom end disc diameter, the upper table of bottom plate 1
Orthogonal two graduation mark 104 is carved in face, and there are four clamping mechanism 2, the upper tables of bottom plate 1 for the installation that is evenly distributed in the upper surface of bottom plate 1
Face is equipped with a Ti Tong mechanism 3；
As shown in figures 1 and 3, clamping mechanism 2 includes first wire nut 201, the first screw rod 202 and slip ring 203；First
Mother 201 is fixedly mounted on the upper surface of bottom plate 1, and one first screw rod 202 is combined in first wire nut 201, on the first screw rod 202
It is coated with graduation mark, and is rotatably connected to a slip ring 203 on the first screw rod 202；Slip ring 203 and the upper surface of bottom plate 1 are formed
It is slidably connected, the end of the first screw rod 202 is equipped with one first hand-operated wheel, uses convenient for people；
As shown in Figure 1 and Figure 4, Ti Tong mechanism 3 include the first mounting plate 301, the second mounting plate 302, the second screw 303,
Second screw rod 304 and snap-gauge 305；First mounting plate 301 is mounted on the upper surface of bottom plate 1, the second peace by the first connecting column 306
Loading board 302 is mounted on the upper surface of the first frame body 301 by the second connecting column 307；First mounting plate 301 and the second mounting plate
302 middle part has extended through the second screw 303, and one second screw rod 304 is combined in two second screws 303；Second screw rod 304
Bottom end be rotatably connected to a strip connecting plate 308；The both ends of strip connecting plate 308 are sliding combined with snap-gauge 305 respectively；Snap-gauge
Arc port compatible with side all at the top of slump cylinder is provided on 305, and two arc ports are oppositely arranged, on two snap-gauges 305 also
Settable clamping mechanism facilitates two mutually clamping, the people of snap-gauge 305 hand by be mounted on 304 top of the second screw rod second
It takes turns to rotate the top of the second screw rod 304 or the second screw rod 304 and install a motor, and motor and the second mounting plate 302 are opposite
It is fixed come, guarantee Ti Tong mechanism 3 to slump cylinder withdrawing at the uniform velocity with power direction.
Wherein, as shown in figures 1 and 3, the upper surface of bottom plate 1 is equipped with height measuring mechanism 4；Height measuring mechanism 4 is wrapped
Include scale column 401, ladder bushing 402 and measuring scale 403；The upper surface of bottom plate 1 is symmetrically installed with scale column 401, scale column 401
Upper to be sliding combined with a ladder bushing 402 respectively, ladder bushing 402 is fixed on scale column 401 by clamping screw, a ladder
All sides of sleeve 402 and one end of measuring scale 403 form and are rotatablely connected, the other end of measuring scale 403 and another ladder bushing
402 phases overlap joint.
Wherein, graduation mark 104 is overlapped with the diagonal line of bottom plate 1, and the intersection point of two graduation marks 104 is zero graduation, graduation mark
104 intersection point is overlapped with the center of circle of round wires 103.
Wherein, the top surface edge of bottom plate 1 is uniformly provided with several sliding slots 105；It sliding slot 105 and is fixed on slip ring 203
Sliding block be slidably matched.
Wherein, connecting plate, the top of connecting plate and 308 end shape of strip connecting plate are fixed on an end face of snap-gauge 305
It is slided at limit.
Wherein, bottom plate 1 is evenly distributed in the upper surface out there are four round hole 106, the bottom of round hole 106 and the first connecting column 306
End forms grafting, and Ti Tong mechanism 3 is dismantled from bottom plate 1, improves the convenience of quality detection device.
One concrete application of the present embodiment are as follows:
Adjustable feet 101 is adjusted according to the state of air level 102, and bottom plate 1 is made to be in horizontality；By slump cylinder
Bottom end is placed on the upper surface of bottom plate 1, and the bottom end disc of slump cylinder coincides with round wires 103；It is rotated further by one of card
The first screw rod 202 in tight mechanism 2, the first screw rod 202 will be that rotation basis is mobile with slip ring 203 with first wire nut 201,
And 203 top shoe of slip ring and being slidably matched for sliding slot 105 ensure that the linear movement of the first screw rod 202；When the first screw rod 202
When end contacts all sides of slump cylinder, stop operating the first screw rod 202, and records the first screw rod 202 at this time opposite the
The number of division of one screw 201 is adjusting other clamping mechanisms 2, and final purpose is the bottom end disc and round wires for guaranteeing slump cylinder
103 coincide, and do not shift；
Then cement slurry is injected inside slump cylinder according to the quality inspection standard of cement slurry, when needing withdrawing slump
Before cylinder separates molding cement slurry mutually with slump cylinder, 306 bottom end of the first connecting column of Ti Tong mechanism 3 is plugged on round hole
In 106, then push snap-gauge 305 that connecting plate is made to carry out limit sliding based on strip connecting plate 308, and 305 arc of snap-gauge
Mouth is in contact with all sides of slump cylinder, is to reinforce two snap-gauges 305 to the withdrawing effect of slump cylinder, can be by two snap-gauges 305
On arc port slump cylinder all sides be in contact after, by two snap-gauges, 305 phase be clamped, at this time the handle of slump cylinder be located at card
The upper surface of plate 305；
The first screw rod 202 is rotated, so that the end of the first screw rod 202 is not in contact with slump cylinder, then rotates second
Screw rod 304 moves up the second screw rod 304 with the second screw 303 rotation basis, and passes through strip connecting plate 308
Snap-gauge 305 is driven to move up, and snap-gauge 305 will drive slump cylinder and molding cement slurry point by the handle on slump cylinder
From；
The one end of last measuring scale 403 is rotation foundation rotation with a ladder bushing 402, and measuring scale 403 is another
Lapping ends adjust height of the ladder bushing 402 on scale column 401 on another ladder bushing 402, make measuring scale 403
It is in contact at the top of molding cement slurry, by the reading of measuring scale 403 and the reading of graduation mark 104, cement slurry can be calculated
Slump and divergence, this process is easy to operate, and people is facilitated to read, and avoids the movement because of slump cylinder, withdrawing and power
The slump and divergence measurement data deviation of cement slurry caused by road D-factor, provide peace for the work and life of people
All risk insurance barrier.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention
Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (6)
1. a kind of plate of novel measurement cement slurry divergence, including bottom plate (1), the bottom plate (1) is a square plate, described
The lower surface edge of bottom plate (1) is uniformly equipped with several adjustable feets (101), and the upper surface of the bottom plate (1) is provided with level
It steeps (102), it is characterised in that:
The upper surface middle part of the bottom plate (1) is carved with a round wires (103) equal with slump cylinder bottom end disc diameter, the bottom
Orthogonal two graduation mark (104) is carved in the upper surface of plate (1), and being evenly distributed in the upper surface for bottom plate (1) is equipped with several cards
Tight mechanism (2), the upper surface of the bottom plate (1) is equipped with a Ti Tong mechanism (3)；
The clamping mechanism (2) includes first wire nut (201), the first screw rod (202) and slip ring (203)；The first wire nut
(201) it is fixedly mounted on the upper surface of bottom plate (1), and is combined with one first screw rod (202), institute in the first wire nut (201)
It states and is coated with graduation mark on the first screw rod (202), and be rotatably connected to a slip ring (203) on first screw rod (202)；It is described
The upper surface of slip ring (203) and bottom plate (1), which is formed, to be slidably connected；
The Ti Tong mechanism (3) includes the first mounting plate (301), the second mounting plate (302), the second screw (303), the second screw rod
(304) and snap-gauge (305)；First mounting plate (301) is mounted on the upper surface of bottom plate (1) by the first connecting column (306),
Second mounting plate (302) is mounted on the upper surface of the first frame body (301) by the second connecting column (307)；First peace
It has been extended through the second screw (303) in the middle part of loading board (301) and the second mounting plate (302), in two second screws (303)
It is combined with one second screw rod (304)；The bottom end of second screw rod (304) is rotatably connected to a strip connecting plate (308)；It is described
The both ends of strip connecting plate (308) are sliding combined with snap-gauge (305) respectively；It is provided with and slump cylinder top on the snap-gauge (305)
The compatible arc port in portion week side, and two arc ports are oppositely arranged.
2. a kind of plate of novel measurement cement slurry divergence according to claim 1, which is characterized in that the bottom plate
(1) upper surface is equipped with height measuring mechanism (4)；The height measuring mechanism (4) includes scale column (401), ladder bushing
(402) and measuring scale (403)；The upper surface of the bottom plate (1) is symmetrically installed with scale column (401), on the scale column (401)
It is sliding combined with respectively a ladder bushing (402), the ladder bushing (402) is fixed on scale column (401) by clamping screw
On, all sides of a ladder bushing (402) and the one end of measuring scale (403) form and are rotatablely connected, the measuring scale (403)
The other end mutually overlapped with another ladder bushing (402).
3. a kind of plate of novel measurement cement slurry divergence according to claim 1, which is characterized in that the graduation mark
(104) it is overlapped with the diagonal line of bottom plate (1), and the intersection point of two graduation marks (104) is zero graduation, the graduation mark (104)
Intersection point be overlapped with the center of circle of round wires (103).
4. a kind of plate of novel measurement cement slurry divergence according to claim 1, which is characterized in that the bottom
The top surface edge of plate (1) is uniformly provided with several sliding slots (105)；The sliding slot (105) and the cunning being fixed on slip ring (203)
Block is slidably matched.
5. a kind of plate of novel measurement cement slurry divergence according to claim 1, which is characterized in that the snap-gauge
(305) connecting plate is fixed on a end face, the top and strip connecting plate (308) end of the connecting plate form limit and slide
It is dynamic.
6. a kind of plate of novel measurement cement slurry divergence according to claim 1, which is characterized in that the bottom plate
(1) be evenly distributed in the upper surface is provided with several round holes (106), and the round hole (106) and the bottom end of the first connecting column (306) are formed
Grafting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811468396.7A CN109557289A (en) | 2018-12-03 | 2018-12-03 | A kind of plate of novel measurement cement slurry divergence |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811468396.7A CN109557289A (en) | 2018-12-03 | 2018-12-03 | A kind of plate of novel measurement cement slurry divergence |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109557289A true CN109557289A (en) | 2019-04-02 |
Family
ID=65868614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811468396.7A Pending CN109557289A (en) | 2018-12-03 | 2018-12-03 | A kind of plate of novel measurement cement slurry divergence |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109557289A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466438A (en) * | 2021-05-19 | 2021-10-01 | 丁遵远 | Building engineering supervision's material detecting system |
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|---|---|---|---|---|
| FI20040361L (en) * | 2003-12-31 | 2005-07-01 | Consolis Technology Oy Ab | Method and apparatus for determining the air content of concrete mass |
| CN204116344U (en) * | 2014-09-24 | 2015-01-21 | 宁波新盛建材开发有限公司 | The pick-up unit of a kind of concrete slump and divergence |
| CN204855304U (en) * | 2015-07-27 | 2015-12-09 | 中国建筑第八工程局有限公司 | Self -compaction concrete slump divergence testing arrangement |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466438A (en) * | 2021-05-19 | 2021-10-01 | 丁遵远 | Building engineering supervision's material detecting system |
| CN113466438B (en) * | 2021-05-19 | 2024-04-09 | 湖南己太项目管理有限公司 | A material testing system for construction engineering supervision |
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Application publication date: 20190402 |