CN115217258A - Construction method of assembled metal plate suspended ceiling - Google Patents
Construction method of assembled metal plate suspended ceiling Download PDFInfo
- Publication number
- CN115217258A CN115217258A CN202210904694.6A CN202210904694A CN115217258A CN 115217258 A CN115217258 A CN 115217258A CN 202210904694 A CN202210904694 A CN 202210904694A CN 115217258 A CN115217258 A CN 115217258A
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- metal plate
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- 239000002184 metal Substances 0.000 title claims abstract description 34
- 238000010276 construction Methods 0.000 title claims abstract description 27
- 238000001514 detection method Methods 0.000 claims abstract description 20
- 238000009434 installation Methods 0.000 claims abstract description 16
- 238000005096 rolling process Methods 0.000 claims abstract description 3
- 239000000725 suspension Substances 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 10
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 5
- 235000017491 Bambusa tulda Nutrition 0.000 description 5
- 241001330002 Bambuseae Species 0.000 description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 5
- 239000011425 bamboo Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 238000005246 galvanizing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 235000012046 side dish Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/388—Separate connecting elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
- E04B9/06—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
- E04B9/18—Means for suspending the supporting construction
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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
- G01C15/12—Instruments for setting out fixed angles, e.g. right angles
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention relates to a construction method of an assembled metal plate suspended ceiling. The assembled metal plate ceiling construction method comprises a hanging rod installation procedure, a keel installation procedure and a veneer installation procedure, wherein a keel used in the keel installation procedure comprises a main keel and a first detection assembly, the main keel is I-shaped, the top surface of the main keel is bilaterally provided with an adjusting assembly, an auxiliary hanging rod is detachably connected onto the adjusting assembly, the top surface of the main keel is provided with a connecting assembly, the main hanging rod is detachably connected onto the connecting assembly, the bottom end of the main hanging rod is provided with a cylindrical seat, the middle part of the bottom surface of the cylindrical seat is provided with a clamping groove, the connecting assembly is provided with a limiting assembly and a second detection assembly, the first detection assembly comprises a guide groove, the inner side of the guide groove is in rolling fit with a roller, a hollow screw penetrates through the middle part of the roller, the assembled metal plate ceiling construction keel can conveniently and rapidly detect whether the main keel is horizontal, and can be rapidly leveled when the main keel inclines, and is high in practicability.
Description
Technical Field
The invention belongs to the technical field of suspended ceiling construction, and particularly relates to a construction method of an assembled metal plate suspended ceiling.
Background
Metal plates are commonly used materials in decoration engineering, and metal plate suspended ceilings are widely applied and are often applied to public areas of architectural decoration, such as walkways, halls and the like. However, since these areas generally require installation of more equipment ducts, the installation schedule of the sheet metal ceiling may be affected to some extent by the installation schedule of the equipment ducts. Therefore, in the prior art, the installation process of the metal plate suspended ceiling is generally divided into multiple processes such as suspender installation, keel installation, veneer installation and the like, generally, holes are drilled on a concrete floor at intervals not more than 1200mm for installing expansion bolts, then hot galvanizing full-thread suspenders with the diameter of 8mm are installed on the expansion bolts, so that main side keels can be installed on the hot galvanizing full-thread suspenders, matched side keels of metal plates are installed on the main side keels, and then metal plates are installed below the matched side keels. Wherein, according to the regulations of the current national standard, when the length of the suspender is more than 1.5 m and not more than 2.5 m, the suspender needs to be reversely supported; and when the length of the suspender is more than 2.5 meters, the suspender is also required to be installed after the steel structure conversion layer is installed. Therefore, the metal plate suspended ceiling has multiple installation procedures, is complex and tedious, seriously influences the construction efficiency and has more hidden quality troubles; in addition, because of the influence of the pipeline, when the metal plate suspended ceiling is installed, the situation that the space distribution is unreasonable and the edge keel layer of the metal plate and the pipeline intersect or even conflict often occurs, so that the situation that the installation elevation has to be reduced often occurs.
Disclosure of Invention
In order to solve the technical problems, the invention provides the construction method of the assembled metal plate suspended ceiling, which can conveniently and quickly detect whether the main keel is horizontal or not, can quickly level when the main keel inclines, has strong practicability and can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a keel for construction of an assembled metal plate suspended ceiling comprises a main keel and a first detection assembly;
the main keel is I-shaped, adjusting components are symmetrically arranged on two sides of the top surface of the main keel, auxiliary suspension rods are detachably connected to the adjusting components, a connecting component is arranged on the top surface of the main keel, a main suspension rod is detachably connected to the connecting component, a cylindrical seat is arranged at the bottom end of the main suspension rod, a clamping groove is formed in the middle of the bottom surface of the cylindrical seat, and a limiting component and a second detection component are arranged on the connecting component;
the first detection assembly comprises a guide groove, the inner side of the guide groove is matched with a roller in a rolling mode, a hollow screw penetrates through the middle of the roller, side discs are movably sleeved on the positions, located on two sides of the roller, of the hollow screw, and a nut is connected to the end portion of the hollow screw in a threaded mode.
Further, the adjusting part includes the support, main joist top surface both ends are located to the support symmetry, the top of support articulates there is the connecting seat, the bottom at the assistant jib is cup jointed at the top of connecting seat, the position threaded connection who is close to the connecting seat top surface on the assistant jib has the nut, the position threaded connection that the bottom of assistant jib is close to the inside top surface of connecting seat has a screw thread section of thick bamboo, and the adjusting part can make the nut upwards slide through the nut of the lower one end of position on the rotatory main joist when main joist has the slope in vertical direction, rotates the screw thread section of thick bamboo again, makes the screw thread section of thick bamboo upwards slide to can make the lower one end of position on the main joist upwards remove, thereby realize the leveling of main joist.
Furthermore, coupling assembling includes extension board, round pin post, connecting plate, connecting hole, cylinder seat and draw-in groove, the both sides at the top surface middle part of main joist are located to the extension board symmetry, both sides the side symmetry of extension board is rotated and is connected with the round pin post, and the relative one end between the round pin post of both sides passes through the connecting plate and connects, the connecting hole has been seted up at the middle part of connecting plate, and the connecting plate with the draw-in groove corresponds.
Further, spacing subassembly includes the side opening, the side opening runs through the side of seting up in the draw-in groove, the one side that is close to outside in the side opening is equipped with the limiting plate, the middle part of limiting plate runs through there is the guide arm, the tip that the limiting plate was kept away from to the guide arm is equipped with the spacer pin, the position that lies in between limiting plate and the spacer pin on the guide arm is equipped with reset spring, through outside pulling the guide arm, makes the spacer pin be located the side opening completely, and reset spring compression this moment corresponds the joint with draw-in groove and connecting plate on the cylinder seat, and the side opening corresponds with the connecting hole this moment, and the release guide arm can make the inboard butt of spacer pin roll-off side opening and through connection hole and draw-in groove to realize dismantling between main jib and the main joist and be connected.
Furthermore, the limiting pin corresponds to the connecting hole.
Furthermore, the second detection assembly comprises a reference plate, a ball body is arranged at the bottom end of the reference plate, a detection rod penetrates through the middle of the ball body, and the detection rod corresponds to the central hole of the middle hole screw.
Furthermore, the second detection assembly further comprises a square bar, the square bar penetrates through the top end of the reference plate, one end of the square bar, which is close to the cylindrical seat, is provided with a half ball seat attached to the side face of the cylindrical seat, an extrusion spring is sleeved at a position, which is located between the reference plate and the half ball seat, on the square bar, scale grooves are uniformly formed in the side face of the square bar, and as the central axis of the main boom and the central axis of the reference plate are always coplanar, when the top face of the main boom and the main keel is not perpendicular, namely the central axis of the main boom deviates from the vertical central axis of the main keel, the reference plate also deviates therewith, the roller is in an initial state and is located at the center of the guide groove, and meanwhile, the center of the roller deviates from the center of the roller.
Compared with the prior art, the invention has the beneficial effects that: this keel is used in construction of assembled sheet metal furred ceiling has following benefit:
1. this regulating assembly of fossil fragments for assembled metal sheet furred ceiling construction can be when the main joist has the slope in vertical direction, through the nut of the lower one end of position on the rotatory main joist, makes the nut upwards slide, and rotatory screw thread section of thick bamboo again makes the screw thread section of thick bamboo upwards slide to can make the lower one end of position on the main joist upwards remove, thereby realize the leveling of main joist.
2. This first determine module of fossil fragments for assembled sheet metal furred ceiling construction can be after having detected the straightness that hangs down between main joist surface and the jib, and the accessible loosens the nut, makes the side dish of both sides not hard up, and when the whole tilt state that is in of main joist, the gyro wheel can be followed the guide slot at middle part and rolled to the lower one end in main joist position to can judge that the whole tilt state that is in of main joist, can utilize adjusting part to carry out the leveling.
3. Because the axis of main jib and the axis of referring to the board are coplane all the time, so when the top surface out of plumb of main jib and main joist, when the vertical axis of the axis skew main joist of main jib promptly, it also can deviate along with it to refer to the board, the gyro wheel is in initial condition and is located the center department of guide slot this moment, the center of gyro wheel can be deviated in the spheroid center simultaneously, in addition, through the slip test bar, if the test bar can't slide in the centre bore of cavity screw, then can further prove the skew gyro wheel of spheroid, thereby can judge out the main joist top surface and whether perpendicular with the main jib.
4. When the top surface of main jib and main joist was out of plumb in the width direction, the cylinder seat can incline to the extension board of one of them side in the both sides to can press the hemisphere seat of moving this side, make the compression of extrusion spring, the square bar is outwards further stretched out, and the accessible was here judged main jib and main joist's top surface out of plumb in the width direction more accurately with the scale groove of square bar side.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged schematic view of the structure at A of the present invention;
FIG. 3 is an enlarged view of the structure at B in FIG. 2;
FIG. 4 is a schematic cross-sectional view of the present invention;
FIG. 5 is a schematic cross-sectional view of a cylindrical base according to the present invention;
in the figure: the device comprises a main keel 1, an auxiliary suspender 11, a main suspender 12, an adjusting component 2, a support 21, a connecting seat 22, a threaded cylinder 23, a nut 24, a first detection component 3, a guide groove 31, a roller 32, a side disc 33, a hollow screw 34, a nut 35, a connecting component 4, a support plate 41, a pin column 42, a connecting plate 43, a connecting hole 44, a cylindrical seat 45, a clamping groove 46, a limiting component 5, a side hole 51, a limiting plate 52, a guide rod 53, a return spring 54, a limiting pin 55, a second detection component 6, a reference plate 61, a spherical body 62, a detection rod 63, a square rod 64, a half ball seat 65, a squeezing spring 66 and a scale groove 67.
Detailed Description
The invention is described in further detail below with reference to the following figures and detailed description:
the construction method of the fabricated metal plate suspended ceiling comprises a hanger rod mounting process, a keel mounting process and a veneer mounting process, wherein a keel used in the keel mounting process comprises a turnout plate 1, the turnout plate 1 is provided with a first rail 3 and a second rail 4 which extend along the left-right direction and are used for being matched with wheels of a transport vehicle, the first rail 3 and the second rail 4 are arranged in a collinear manner, the turnout plate 1 is provided with a first guide rail plate 5 and a second guide rail plate 6 which extend along the front-back direction, the first guide rail plate 5 is provided with a first rail groove 7 which is used for being matched with the wheels of a production vehicle, the second guide rail plate 6 is provided with a second rail groove 8 which is used for being matched with the wheels of the production vehicle, the first rail groove 7 and the second rail 4 are arranged in a collinear manner, the first rail 3 and the second rail plate 4 are arranged at intervals so as to form a wheel groove 9 which is communicated with the first rail groove 7 and the second rail groove 8 and is matched with the wheels of the production vehicle, and the turnout plate 1 is respectively arranged at the front side and the back side of the first rail 3 and the second rail 4.
In this embodiment, the front and rear side surfaces of the switch plate 1 are hyperboloids, and the left and right side surfaces of the switch plate 1 are vertical planes. Anticreep board 2 has four, and four anticreep board 2 are arranged both ends around turnout board 1, and four anticreep board 2 are the hyperbola structure. The cross-section of first track 3 and second track 4 all is the rectangle, and the one end that first track 3 is close to switch board 1 is equipped with the L shape draw-in groove of card on switch board 1, and the one end that second track 4 is close to switch board 1 is equipped with the L shape draw-in groove of card on switch board 1. The cross section of the first guide rail plate 5 is concave, the rectangular groove on the first guide rail plate 5 forms a first rail groove 7, the cross section of the second guide rail plate 6 is concave, and the rectangular groove on the second guide rail plate 6 forms a second rail groove 8. The first rail plate 5, the second rail plate 6, the first rail 3, and the second rail 4 are equidistant from the center position of the switch plate 1.
The construction method of the fabricated metal plate suspended ceiling is paved on the ground in pairs, the first track 3 and the second track 4 on the construction method of the fabricated metal plate suspended ceiling are butted with guide rails of a transport vehicle in a production workshop, and the first guide rail plate 5 and the second guide rail plate 6 on the construction method of the fabricated metal plate suspended ceiling are butted with guide rails of the production vehicle in the production workshop. A transport vehicle in a production workshop slides on the first track 3 and the second track 4 in the construction method of the assembled metal plate suspended ceiling, and the derailing prevention plate 2 on the turnout plate 1 limits wheels of the transport vehicle to prevent derailing. The production vehicle in the production shop slides through the first rail groove 7 and the second rail groove 8 in the fabricated sheet metal ceiling construction method of the present invention. Compared with the prior art, the construction method of the fabricated metal plate suspended ceiling can enable a production vehicle and a transport vehicle in a workshop to pass stably, and the transport vehicle is not easy to derail.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The construction method of the assembled metal plate suspended ceiling comprises a suspender installation procedure, a keel installation procedure and a veneer installation procedure, and is characterized in that a keel used in the keel installation procedure comprises a main keel and a first detection assembly;
the main keel is I-shaped, adjusting components are symmetrically arranged on two sides of the top surface of the main keel, an auxiliary suspension rod is detachably connected onto each adjusting component, a connecting component is arranged on the top surface of the main keel, the main suspension rod is detachably connected onto each connecting component, a cylindrical seat is arranged at the bottom end of each main suspension rod, a clamping groove is formed in the middle of the bottom surface of each cylindrical seat, and a limiting component and a second detection component are arranged on each connecting component;
the first detection assembly comprises a guide groove, a roller is matched with the inner side of the guide groove in a rolling mode, a hollow screw penetrates through the middle of the roller, side discs are movably sleeved on the positions, located on two sides of the roller, of the hollow screw, and a nut is connected to the end portion of the hollow screw in a threaded mode.
2. The construction method of the assembled metal plate suspended ceiling as claimed in claim 1, wherein the adjusting assembly comprises supports symmetrically arranged at two ends of the top surface of the main keel, connecting seats are hinged to the tops of the supports, the tops of the connecting seats are sleeved on the bottoms of the auxiliary suspenders, nuts are screwed on the positions, close to the top surfaces of the connecting seats, of the auxiliary suspenders, and threaded cylinders are screwed on the positions, close to the inner top surfaces of the connecting seats, of the bottoms of the auxiliary suspenders.
3. The construction method of the fabricated metal plate suspended ceiling as claimed in claim 1, wherein the connecting assembly comprises supporting plates, pin columns, connecting plates, connecting holes, cylindrical seats and clamping grooves, the supporting plates are symmetrically arranged on two sides of the middle of the top surface of the main keel, the pin columns are symmetrically and rotatably connected to the side surfaces of the supporting plates on two sides, opposite ends of the pin columns on two sides are connected through the connecting plates, the connecting holes are formed in the middle of the connecting plates, and the connecting plates correspond to the clamping grooves.
4. The fabricated metal plate ceiling construction method according to claim 1, wherein the limiting assembly comprises a side hole, the side hole penetrates through the side face of the clamping groove, a limiting plate is arranged on one side, close to the outside, in the side hole, a guide rod penetrates through the middle of the limiting plate, a limiting pin is arranged at the end, away from the limiting plate, of the guide rod, and a return spring is arranged between the limiting plate and the limiting pin on the guide rod.
5. The fabricated metal sheet ceiling construction method of claim 4, wherein the spacer pin corresponds to the connection hole.
6. The fabricated metal plate ceiling construction method according to claim 1, wherein the second detection assembly comprises a reference plate, a sphere is arranged at the bottom end of the reference plate, the center of the sphere corresponds to the center of the roller in the initial state, a detection rod penetrates through the middle of the sphere, and the detection rod corresponds to the central hole of the hollow screw.
7. The construction method of the assembled metal plate suspended ceiling according to claim 6, wherein the second detection assembly further comprises a square rod, the square rod penetrates through the top end of the reference plate, a half ball seat attached to the side face of the cylindrical seat is arranged at one end, close to the cylindrical seat, of the square rod, an extrusion spring is sleeved on the position, located between the reference plate and the half ball seat, of the square rod, and scale grooves are uniformly formed in the side face of the square rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210904694.6A CN115217258B (en) | 2022-07-29 | 2022-07-29 | Construction method of assembled metal plate suspended ceiling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210904694.6A CN115217258B (en) | 2022-07-29 | 2022-07-29 | Construction method of assembled metal plate suspended ceiling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115217258A true CN115217258A (en) | 2022-10-21 |
| CN115217258B CN115217258B (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210904694.6A Active CN115217258B (en) | 2022-07-29 | 2022-07-29 | Construction method of assembled metal plate suspended ceiling |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1703034A1 (en) * | 2005-03-18 | 2006-09-20 | Chicago Metallic Continental | Ceiling suspension system |
| CN106284815A (en) * | 2016-08-12 | 2017-01-04 | 中国航天建设集团有限公司 | Furred ceiling clean board construction technique |
| CN209457229U (en) * | 2018-10-26 | 2019-10-01 | 深圳市库博建筑设计事务所有限公司 | A kind of indoor verandas ceiling structure |
| CN111321838A (en) * | 2020-03-11 | 2020-06-23 | 深圳机械院建筑设计有限公司 | Heat insulation building suspended ceiling with ventilation effect |
| CN213115325U (en) * | 2020-08-14 | 2021-05-04 | 蔡龙跃 | A novel keel structure for building engineering |
| CN213180043U (en) * | 2020-10-19 | 2021-05-11 | 杭州千鼎五金有限公司 | Ceiling keel perpendicularity detection device |
-
2022
- 2022-07-29 CN CN202210904694.6A patent/CN115217258B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1703034A1 (en) * | 2005-03-18 | 2006-09-20 | Chicago Metallic Continental | Ceiling suspension system |
| CN106284815A (en) * | 2016-08-12 | 2017-01-04 | 中国航天建设集团有限公司 | Furred ceiling clean board construction technique |
| CN209457229U (en) * | 2018-10-26 | 2019-10-01 | 深圳市库博建筑设计事务所有限公司 | A kind of indoor verandas ceiling structure |
| CN111321838A (en) * | 2020-03-11 | 2020-06-23 | 深圳机械院建筑设计有限公司 | Heat insulation building suspended ceiling with ventilation effect |
| CN213115325U (en) * | 2020-08-14 | 2021-05-04 | 蔡龙跃 | A novel keel structure for building engineering |
| CN213180043U (en) * | 2020-10-19 | 2021-05-11 | 杭州千鼎五金有限公司 | Ceiling keel perpendicularity detection device |
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| Publication number | Publication date |
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| CN115217258B (en) | 2023-09-05 |
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