CN220790675U - Concrete slab surface covering construction device - Google Patents
Concrete slab surface covering construction device Download PDFInfo
- Publication number
- CN220790675U CN220790675U CN202322223665.6U CN202322223665U CN220790675U CN 220790675 U CN220790675 U CN 220790675U CN 202322223665 U CN202322223665 U CN 202322223665U CN 220790675 U CN220790675 U CN 220790675U
- Authority
- CN
- China
- Prior art keywords
- scraping
- shaped
- trowelling
- box
- plate
- 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.)
- Active
Links
- 238000010276 construction Methods 0.000 title claims abstract description 36
- 238000007790 scraping Methods 0.000 claims abstract description 74
- 239000000463 material Substances 0.000 claims abstract description 23
- 238000005452 bending Methods 0.000 claims description 13
- 210000002489 tectorial membrane Anatomy 0.000 claims description 8
- 238000010030 laminating Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 230000001681 protective effect Effects 0.000 description 31
- 238000000034 method Methods 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000004570 mortar (masonry) Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000013519 translation Methods 0.000 description 3
- 239000007888 film coating Substances 0.000 description 2
- 238000009501 film coating Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The utility model discloses a concrete slab surface covering construction device, which is characterized in that the tops of a box-shaped scraping plate and a leveling scraping rule which are arranged in parallel are connected through a plurality of groups of connecting rods, the section of the leveling scraping rule is L-shaped, the width of the leveling scraping rule is larger than that of the box-shaped scraping plate, one end of the leveling scraping rule is aligned with the box-shaped scraping plate, a U-shaped scroll bracket which is fixed on the connecting rods and extends upwards is used for sleeving and hanging a coiled material roller, two sides of the leveling scraping rule are connected with a U-shaped fixing piece and a U-shaped buckle, a roller I and a roller II are respectively sleeved and hung on the U-shaped fixing piece and the U-shaped buckle, and the leveling scraping rule, the coiled material roller, the roller I and the roller II are consistent in width and aligned at two ends.
Description
Technical Field
The utility model relates to the field of building concrete construction. More particularly, the utility model relates to a concrete slab surface covering film construction device.
Background
In the solidification process after concrete pouring, if a large amount of water is lost or added, the strength of a formed concrete member is reduced, structural cracks, surface reverse sand and other conditions are easy to generate, in the conventional plate construction process, the concrete is firstly coarsely and smoothly laid on a bottom template uniformly, then the surface of the plate is smoothly laid by utilizing a manual surface collecting process, finally, a plastic protective film is manually laid, in order to avoid water loss or water inflow of the plate, the two processes of surface collecting and protective film laying need to be connected in place, a large amount of labor is needed in the process, workers can trample again in the area of the surface collected, secondary surface collecting is needed along with the protective film laying, in addition, the surface of the plate needs to be fully covered by the protective film, and the adjacent two protective films need to have a certain overlap width, so that the condition that the protective film without overlap is easily blown open by weather or rainwater flows in a large amount from the gaps is avoided.
The utility model discloses a concrete receipts face tectorial membrane integrated device, utilize hinge connection push-and-pull rod at receipts face dull and stereotyped upper surface, receive the both sides of face dull and stereotyped and are connected with a flexible buckle of U type respectively, flexible buckle one end is connected with receipts dull and stereotyped dismantlement, the opposite side stretches into in the film reel, this equipment can realize receiving face and tectorial membrane on the same one and go on simultaneously, but the device is difficult to let adjacent two protection films accomplish overlap joint, if directly press scraper blade one side pressure on the protection film that has been constructed overlap joint then receive the dull and stereotyped front side wall of face except can make the protection film fold of construction before, the concrete fine aggregate and a large amount of thick liquid of scraping will directly pollute the protection film that has been constructed, when later stage uncovering the protection film, the film reel of the device is direct with concrete surface contact, easily make the protection film coiled material pollution lead to out the membrane unsmooth in the construction. Therefore, it is necessary to design a construction device capable of overlapping the film according to the process requirements while the concrete is being received.
Disclosure of utility model
The utility model aims to provide a device which can integrate two working procedures of a concrete slab body surface folding process and a film laminating process and ensure the laying process requirement of a protective film, and can effectively solve the problem that the prior art is difficult to finish the lap joint of the protective film by using a tool.
To achieve these objects and other advantages and in accordance with one aspect of the present utility model, there is provided a concrete slab finishing and covering construction device comprising:
The scraping plate assembly comprises box-shaped scraping plates and trowelling scraping rules which are arranged in parallel, the tops of the box-shaped scraping plates and the trowelling scraping rules are connected through a plurality of groups of connecting rods, the section of each trowelling scraping rule is L-shaped, a vertical plate of each trowelling scraping rule is close to the box-shaped scraping plates, the bottom surface of each transverse plate is in the same plane with the bottom surface of each box-shaped scraping plate, and the width of each trowelling scraping rule is larger than that of each box-shaped scraping plate, and one end of each trowelling scraping rule is aligned;
the laminating assembly comprises a reel bracket which is fixed on the connecting rod and extends upwards, the reel bracket is a U-shaped member, two ends of the reel bracket are provided with symmetrical bending sections which extend inwards, coiled material rollers are sleeved and hung on the two bending sections, two U-shaped fixing pieces are symmetrically connected with two ends of the side wall of a vertical plate of the trowelling scraping ruler, which is far away from the box-shaped scraping plate, one arm of the U-shaped fixing piece is connected with the vertical plate of the trowelling scraping ruler, the other arm is suspended, a roller I is sleeved between the suspended arms of the two U-shaped fixing pieces, two U-shaped buckles are symmetrically connected with two ends of the upper surface of a transverse plate of the trowelling scraping ruler, one arm of the U-shaped buckle is detachably connected with the transverse plate of the trowelling scraping ruler, and a roller II is sleeved between the suspended arms of the two U-shaped buckles;
the trowelling scraping rule, the coiled material roller, the roller I and the roller II are consistent in width and aligned at two ends.
Preferably, the cross section of the box-shaped scraping plate is in a right trapezoid shape, the left side surface and the right side surface of the box-shaped scraping plate are open, and the inclined side wall of the box-shaped scraping plate is far away from the trowelling scraping rule.
Preferably, the outer side wall of the joint of the horizontal plate and the vertical plate of the trowelling scraping ruler is arc-shaped.
Preferably, any bending section of the scroll support is detachably connected with the scroll support.
Preferably, two ends of the transverse plate of the trowelling scraping rule are connected with lug plates with through holes in the middle, and one arm of the U-shaped buckle is detachably connected with the lug plates.
Preferably, the upper surface of the box-shaped scraping plate is detachably connected with a square-shaped pull rod.
The utility model at least comprises the following beneficial effects:
According to the concrete slab surface covering film construction device provided by the utility model, a lap joint area meeting the technological requirements is formed between the protective film paved while finishing surface covering and the protective film paved before, and a small amount of water and concrete floating paste can be scraped between the two protective films in the lap joint area by trowelling the scraping rule before film covering, so that certain adhesive force exists between the two protective films, and the situation that the two protective films are easily uncovered by wind is avoided.
Secondly, the concrete slab surface covering film construction device provided by the utility model has the advantages that the protective film coiled material and the coiled material roller are higher than the ground, so that the protective film coiled material and the coiled material roller are not easy to be polluted in the concrete construction process, and the protective film is smoothly laid.
Thirdly, the concrete slab surface covering film construction device provided by the utility model has the advantages that all connection modes are simpler, the protective film coiled material and the roller II are convenient and quick to detach and replace, the connection modes of all the connection positions are simple, and the situation of difficult use after the concrete is polluted is not easy to occur.
Drawings
The utility model is described in further detail below with reference to the attached drawings and embodiments:
Fig. 1 is a working schematic diagram of a concrete slab surface covering film construction device according to an embodiment of the present utility model.
Fig. 2 is a right side view of the concrete slab covering construction device according to the embodiment of the present utility model.
Fig. 3 is a top view of a scraper assembly of a concrete slab covering construction device according to an embodiment of the present utility model.
Fig. 4 is a schematic view of a concrete slab surface covering film construction device according to an embodiment of the present utility model without a coil or a roll.
Fig. 5 is a schematic working diagram of a film covering assembly of a concrete slab surface covering film construction device according to an embodiment of the present utility model.
Fig. 6 is a schematic connection diagram of a U-shaped buckle and a U-shaped fixing member of the concrete slab surface covering construction device according to the technical scheme of the utility model.
Fig. 7 is a schematic working diagram of a detachable connection node of the concrete slab surface covering construction device according to the technical scheme of the utility model.
Detailed Description
The present utility model is described in further detail below with reference to the drawings to enable those skilled in the art to practice the utility model by referring to the description.
It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It should be noted that the experimental methods described in the following embodiments, unless otherwise specified, are all conventional methods, and the reagents and materials, unless otherwise specified, are all commercially available; in the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, or detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. The terms "transverse," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used for convenience in describing and simplifying the description of the present utility model based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present utility model.
As shown in fig. 1 to 7, the technical scheme of the application provides a concrete slab surface covering film construction device, which comprises:
The utility model provides a scraper blade subassembly, it includes parallel arrangement's box scraper blade (1) and screeding scraper blade (2), link to each other through multiunit connecting rod (4) between the top of the two, screeding scraper blade (2) cross-section is L shape, and its riser is close to box scraper blade (1), the diaphragm bottom surface with the bottom surface of box scraper blade (1) is in the coplanar, the width of screeding scraper blade (2) is greater than box scraper blade (1) and one end align, tectorial membrane subassembly, it including be fixed in spool support (5) that connecting rod (4) upwards extends, it is U style of calligraphy component, the both ends of spool support (5) are provided with the bending section that the symmetry extends to the inboard, and the cover has coiled material roller (32) on two bending section, the lateral wall both ends symmetry that box scraper blade (1) were kept away from to the riser of screeding scraper blade (2) have two U type mounting (61), one arm of U type mounting (61) with the riser connection of screeding scraper blade (2), another arm (4) is aligned, and the tectorial membrane subassembly, it is fixed in spool support (5) that connecting rod (4) upwards extends upwards, one end of two U type (7) is equipped with two U type (7) between the two, one end of screeding scraper blade (7) and two end (71) are connected to one end of screeding scraper blade (2), one end of screeding scraper blade (7) is connected to one end of screeding scraper blade (1) The coiled material roller (32), the roller I (6) and the roller II (7) are consistent in width and aligned at two ends.
The concrete slab receipts face tectorial membrane construction equipment who provides in this technical scheme, scraper blade subassembly comprises box scraper (1), trowelling scraper (2) through the connection, and parallel arrangement around box scraper (1) and trowelling scraper (2), trowelling scraper riser are connected with two L type angle yards (21) near one side of box scraper (1), connecting rod (4) shape is the shape of falling T, and bolt hole is opened on its two sections flanges, and bolt (41) are connected connecting rod (4) and L type angle yard (21) and box scraper (1) top surface, and trowelling scraper (2) are wider than box scraper (1) and two one side are aligned.
The concrete slab receipts face tectorial membrane construction equipment that provides in this technical scheme, tectorial membrane subassembly comprises coiled material (3) and a plurality of cylinder and corresponding fixing device, through-hole is transversely seted up to connecting rod (4) makes spool support (5) can pass therefrom, spool support (5) are buckled by round section reinforcing bar and are formed, it adopts welded connection to fix generally between connecting rod (4), also can select to dismantle the connection, the both ends of spool support (5) are provided with the bending section that the symmetry inwards extends, the bending section can be directly buckled by the reinforcing bar and shaping, also can select to dismantle the connection, coiled material roller (32) cover is hung on the bending section of spool support (5), U type mounting (61) and U type buckle (71) are respectively arranged one in the both sides of trowelling scraper (2), in order to overlap respectively hang roller one (6) and roller two (7).
According to the concrete slab surface covering film construction device, the width of the screeding scraping rule (2), the width of the coiled material roller (32), the width of the roller I (6) and the width of the roller II (7) are consistent, two ends of the screeding scraping rule are aligned, when constructors pull the horizontal pull rod (8) and draw back the construction, one side of the box scraping rule (1) which is not aligned with the screeding scraping rule (2) is close to the edge line of the protective film finishing section (33), the position of the uneven concrete surface is screeded by the inclined front plate (11) and the redundant concrete is transferred to two sides along the surface of the inclined front plate (11), the part of the screeding scraping rule (2) which is longer than the box scraping rule (1) is pressed on the protective film finishing section (33), the superfluous moisture and the mortar on the surface of a concrete slab body in the width range are uniformly swept along with the sliding of the screeding scraping rule (2), the edge of the protective film finishing section (33) below is compacted, the adhesive force of mortar and the adhesive force of the mortar and the protective film finishing section (33) below, the protective film (31) is attached to the concrete surface and the surface of the protective film finishing section (33) and the surface of the protective film is formed, the protective film (31) is continuously compacted, and the protective film (31) can be continuously paved on the surface of the roll (7) and the roll (32) can be continuously paved on the roll I (32).
In the technical scheme, the two working procedures of concrete slab surface collection and film coating are integrated, the construction quality is ensured, the field construction working efficiency is optimized, the process of lapping the protective film can be realized, the protective film is not easy to be uncovered by weather conditions such as wind and rain, and meanwhile, only the pulled protective film directly contacts with concrete in the film coating process, so that the pollution of coiled materials in the construction process is avoided.
In another technical scheme, the cross section of box scraper blade (1) is right trapezoid, box scraper blade (1) left and right sides face is opened, by top surface, bottom surface, front side, four steel sheets of rear side splice constitution, and the slant front bezel (1) of box scraper blade (1) is kept away from trowelling scraper blade (2), and the minor face one side of box scraper blade (1) aligns with trowelling scraper blade (2) one end, and in box scraper blade (1) forward translation slip in-process, slant front bezel (11) is in the outside of the minor face side of box scraper blade (1) with vast majority unnecessary mortar and aggregate guide to the strickle surface, does not have the construction area promptly.
In another technical scheme, the outer side wall of the joint of the transverse plate and the vertical plate of the trowelling scraping ruler (2) is arc-shaped, a small amount of water and floating paste remained between the trowelling scraping ruler (2) and the box-type scraping plate (1) are uniformly scraped in the forward translation sliding process, the concrete surface is further flattened, the trowelling scraping ruler (2) slides on the protective film finishing section (33) to enable the surface to be attached with a small amount of water and floating paste while being compacted, and the outer side wall of the joint of the transverse plate and the vertical plate of the trowelling scraping ruler (2) is arc-shaped, so that the trowelling scraping ruler (2) cannot scrape to damage the protective film finishing section (33) in the forward translation sliding process.
In another technical scheme, arbitrary section of buckling of spool support (5) is detachable connection with spool support, and another section of buckling is fixed section of buckling (53), and it can be by spool support (5) direct mechanical bending shaping of end when processing, and detachable section of buckling comprises internal thread sleeve (51) and the cover of buckling in that the end level sets up adjustable bolt (52), and adjustable bolt (52) accessible is revolved the mode of twisting and is changed its length in the sleeve inboard, and this mode is convenient for quick replacement coiled material (3) and coiled material sleeve (32), coiled material (3) and coiled material sleeve (32) are market purchase in this technical scheme.
In another technical scheme, the diaphragm both ends of the trowelling scraper (2) are connected with the first otic placode (72) of middle area through-hole, an arm of U type buckle (71) with first otic placode (72) detachable connection, U type buckle (71) are by the smooth round bar bending forming of diameter less than first otic placode (72) through-hole internal diameter, U type buckle (71) one of them arm is equipped with the screw thread, stretches into behind the first otic placode (72) through-hole from the outside with its arm that is equipped with the screw thread, twists nut (73) from the tip, and the both ends cover of roller two (7) is established on the first arm of U type buckle (71) screwless, receives U type buckle (71) traction in the use and rolls on protection film (31), rolls out the bubble between protection film (31) and the below contact surface.
In another technical scheme, the upper surface of box scraper blade (1) is detachably connected with several style of calligraphy pull rod (8), and two otic placode second (81) that have the through-hole in the center are connected side by side at the upper surface of box scraper blade (1), and several style of calligraphy pull rod (8) are connected by many round reinforcing bars and are constituteed, the both ends of several style of calligraphy pull rod (8) outwards buckle and overlap and hang in the through-hole of two otic placode second (81), and this kind of connected form is simple high-efficient, and does not receive box scraper blade (1) concrete pollution's influence basically.
The number of components and the scale of processing described herein are intended to simplify the description of the present utility model. Applications, modifications and variations of the present utility model will be readily apparent to those skilled in the art.
Although embodiments of the present utility model have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the utility model would be readily apparent to those skilled in the art, and accordingly, the utility model is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (6)
1. The concrete slab receipts face tectorial membrane construction equipment, its characterized in that includes:
The scraping plate assembly comprises box-shaped scraping plates and trowelling scraping rules which are arranged in parallel, the tops of the box-shaped scraping plates and the trowelling scraping rules are connected through a plurality of groups of connecting rods, the section of each trowelling scraping rule is L-shaped, a vertical plate of each trowelling scraping rule is close to the box-shaped scraping plates, the bottom surface of each transverse plate is in the same plane with the bottom surface of each box-shaped scraping plate, and the width of each trowelling scraping rule is larger than that of each box-shaped scraping plate, and one end of each trowelling scraping rule is aligned;
the laminating assembly comprises a reel bracket which is fixed on the connecting rod and extends upwards, the reel bracket is a U-shaped member, two ends of the reel bracket are provided with symmetrical bending sections which extend inwards, coiled material rollers are sleeved and hung on the two bending sections, two U-shaped fixing pieces are symmetrically connected with two ends of the side wall of a vertical plate of the trowelling scraping ruler, which is far away from the box-shaped scraping plate, one arm of the U-shaped fixing piece is connected with the vertical plate of the trowelling scraping ruler, the other arm is suspended, a roller I is sleeved between the suspended arms of the two U-shaped fixing pieces, two U-shaped buckles are symmetrically connected with two ends of the upper surface of a transverse plate of the trowelling scraping ruler, one arm of the U-shaped buckle is detachably connected with the transverse plate of the trowelling scraping ruler, and a roller II is sleeved between the suspended arms of the two U-shaped buckles;
the trowelling scraping rule, the coiled material roller, the roller I and the roller II are consistent in width and aligned at two ends.
2. The concrete slab surface covering construction device according to claim 1, wherein the cross section of the box-type scraping plate is in a right trapezoid shape, the left side surface and the right side surface of the box-type scraping plate are open, and the inclined side wall of the box-type scraping plate is far away from the trowelling scraping rule.
3. The concrete slab surface covering construction device according to claim 1, wherein the outer side wall of the joint of the screeding scraping ruler transverse plate and the vertical plate is arc-shaped.
4. The concrete slab take-up surface coating construction device according to claim 1, wherein any bending section of the reel bracket is detachably connected with the reel bracket.
5. The concrete slab surface covering construction device according to claim 1, wherein two ends of a transverse plate of the trowelling scraping rule are connected with ear plates with through holes in the middle, and one arm of the U-shaped buckle is detachably connected with the ear plates.
6. The concrete slab surface covering construction device according to claim 1, wherein a square-shaped pull rod is detachably connected to the upper surface of the box-shaped scraping plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322223665.6U CN220790675U (en) | 2023-08-18 | 2023-08-18 | Concrete slab surface covering construction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322223665.6U CN220790675U (en) | 2023-08-18 | 2023-08-18 | Concrete slab surface covering construction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220790675U true CN220790675U (en) | 2024-04-16 |
Family
ID=90658543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322223665.6U Active CN220790675U (en) | 2023-08-18 | 2023-08-18 | Concrete slab surface covering construction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220790675U (en) |
-
2023
- 2023-08-18 CN CN202322223665.6U patent/CN220790675U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206928189U (en) | Crash barrier template system and outer-enwraped type anticollision barrier | |
| CN206448541U (en) | One kind is built a wall multi-functional ash bucket | |
| CN208152597U (en) | A kind of masonry mortar application device for brick setting engineering | |
| CN214658892U (en) | High-low grade concrete intercepting device | |
| CN220790675U (en) | Concrete slab surface covering construction device | |
| CN112110301A (en) | Method for laying composite geomembrane for building construction | |
| CN209469000U (en) | Truss and truss aluminium alloy tunnel form for aluminum alloy mould plate | |
| CN202090570U (en) | Plastering screed template | |
| CN216838865U (en) | Simple and easy curb lays supplementary leveling device | |
| CN210315163U (en) | Pavement concrete processor | |
| CN211775929U (en) | Ash paving device for different masonry structures | |
| CN210798340U (en) | Simple mortar laying and laying pointing trolley | |
| CN208121825U (en) | Waterstop and construction joint water sealing structure including the waterstop | |
| CN208363140U (en) | A kind of mounting structure of subway station side wall steel side waterstop | |
| CN207211208U (en) | Basic post-cast strip side shaping tool | |
| CN207277829U (en) | For forming the positioner of drop plate or faulting of slab ends | |
| CN217629467U (en) | Hollow plate hinge joint construction device | |
| CN205654049U (en) | Reentrant corner floater | |
| CN214942540U (en) | Concrete surface collecting and film covering device | |
| CN212002399U (en) | Hard protective structure of foldable overhanging outer frame bottom | |
| CN219365325U (en) | Epoxy terrace laying equipment | |
| CN214290124U (en) | Metal pipe environment-friendly building material recycling and processing device | |
| CN218508616U (en) | Mortar band-plastering tool for bell and spigot concrete drainage pipeline | |
| CN215974076U (en) | Concrete feeding device with conical guiding function | |
| CN217499875U (en) | Energy-saving and environment-friendly bedding tool for highway construction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |