CN102140821A - High-tension steel grating - Google Patents
High-tension steel grating Download PDFInfo
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- CN102140821A CN102140821A CN2010101165179A CN201010116517A CN102140821A CN 102140821 A CN102140821 A CN 102140821A CN 2010101165179 A CN2010101165179 A CN 2010101165179A CN 201010116517 A CN201010116517 A CN 201010116517A CN 102140821 A CN102140821 A CN 102140821A
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- section bar
- grid
- high tension
- steel
- tension steel
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Abstract
The invention specifically provides a grating with industrial value, which is made of high-tension steel, wherein an end sectional material uses a high-tension steel plate as a raw material, a vertical part, a bearing part and a supporting part are formed through the plasticity processing of the high-tension steel plate, wherein the vertical part is connected with both ends of a bearing sectional material; the bearing part is connected together with the lower end of the vertical part and used for bearing the lower sides of the two ends; and the supporting part vertically extends from the upper end of the vertical part in the opposite direction of the bearing part in a form of a right angle The bearing part and the supporting part can be used for bearing a load applied to the bearing sectional material.
Description
[technical field]
The present invention relates to mechanical manufacturing field, relate in particular to a kind of lid of road lateral sulcus etc. or cancellate grid on floor of being used for.
[background technology]
In the prior art, the structure of grid that is used for the lid of asphalt road lateral sulcus etc. is that the rectangle carrying section bar that will comprise " I " shaped sections is arranged in parallel under upright state, connects its upper end side by intersecting section bar, thereby forms grille.Connect the both ends of carrying section bar respectively by the end section bar, rainwater on the road or sandy soil fall in the lateral sulcus by this grille.
Owing to people or vehicle are often arranged by above the grid, so uneven in order to eliminate, for the carrying section bar, the section bar that intersects carries out upset butt welding in the mode of not having outstanding state from the upper surface of carrying section bar.
Therefore, when keeping the intensity of this grid, seek lightweight; And keep identical shaped in, improve intensity, can adopt high tension steel as the raw material of grid.Relevant employing high tension steel had had record as the grid raw material in patent documentation 1 (TOHKEMY 2002-356760 communique, the 0004th section, the 0006th section).
But, this patent documentation 1 is only with the raw-material embodiment of grid, and the enlightenment of giving high tension steel does not specifically demonstrate the characteristic of having utilized high tension steel, for example: under same intensity, can make the plate thickness attenuation, thereby obtain to have the high tension steel grid of industrial value.
Patent documentation 2: Japan is real No. 3033439 communiques (Fig. 1,2 end angle steel 2,2 ') of passing the imperial examinations
[summary of the invention]
Technical problem to be solved by this invention is, a kind of high tension steel that adopts is provided, and has the grid of industrial value.
In order to address the above problem, the invention provides a kind of high tension steel grid that is used for the lid of road lateral sulcus etc., described grid is included in the carrying section bar of the square-section that is arranged in parallel under the state of setting, do not have under the outstanding state from the upper surface of described carrying section bar at described intersection section bar, form grille by upset butt welding by the upper end side that the intersection section bar connects described carrying section bar, and connect the both ends of described carrying section bar by the end section bar.The present invention further increases in above-mentioned essential structure to be had: the end section bar is raw material with the high tension steel steel plate, by this high tension steel steel plate is carried out plastic working, form to connect the vertical component effect of the two end portions of described carrying section bar, connect together and bear with the end portion of described vertical component effect this two end portions lower side the portion of bearing and from the upper part of described vertical component effect and the described portion's rightabout that bears with extended support portion, right angle, bear portion and the load that imposes on described carrying section bar can be born in described support portion by described.
That is, generally this high tension steel grid is called U font ditch grid, is used for the U font ditch that the whole nothing that embeds of grid is born ditch, and the upper end, both sides of grill body is provided with flanging, in the load of grid, also is known as the grid of band flanging by this flanging role-taking.
In the grid of the type of the present invention, set high tension steel for by the end section bar that will comprise the flanging part, when keeping same intensity, realize thin-walled property.And, because thin-walled property adopts small lot can satisfy the specification requirement that comprises the grid that carries section bar immediately by the general easy high-tensile steel that obtains is carried out the end section bar that plastic working can be made the band flanging
In addition, further bring into play the advantage of above-mentioned thin-walled property among the present invention, in the grid of this band flanging, increase the support portion above the contact U font ditch, can one-body moldedly bear the portion of bearing of the following side at the two ends of carrying section bar by plastic working and employing high-tensile steel, compare with the end section bar that only adopts angle steel in the prior art (being also referred to as " end angle steel "), can avoid better because the load-carrying section bar comes off from the end section bar.
Have again, the portion of bearing that bear the lower portion of the two end portions of carrying section bar this moment diminishes the aperture area of the grille of grid, because the mode small-sized that hope does not diminish with this aperture area as far as possible, so, in the scope that plays the effect of bearing this lower portion, require small-sized.But, carry out plastic working by high-tensile steel to thin-walled, can satisfy this requirement.
In addition, in the object of high tension steel grid of the present invention, be not limited to the grid of above-mentioned band flanging, comprise the grid (so-called " general lateral sulcus grid ") of so-called no flanging.The grid of this no flanging is used for being provided with at the road lateral sulcus lateral sulcus of the portion of bearing that embeds grid, adopts top and grid top consistent of lateral sulcus.
Among the present invention, the grid of motion is characterised in that: under the situation of this no flanging grid, adopt the place of high tension steel particularly to only limit to bear the carrying section bar of the load that imposes on grid as its raw material, in addition intersection section bar, end section bar adopt original steel.
According to the grid of this no flanging, have an advantage that the carrying section bar adopts high tension steel, promptly keep with original steel same intensity in, realized the raising of thin-walled property, aperture opening ratio.On the other hand, with original steel be under the situation of same size, do not change corresponding size or shape, when performance realizes this advantage of high strength, can eliminate the problem on deformation after all being the welding fabrication that takes place under the situation of high tension steel, performance can meet the effect of the product of product specification by the high engineering manufacturing of productivity ratio as far as possible.
Have again, among the present invention, for the band flanging or there is not arbitrary situation of the grid of flanging, set high tension steel for by carrying section bar, under the situation that realizes the irrealizable thin-walled property of original steel, in order to be suitable for carrying out the corresponding upset butt welding of thickness with the book wall of original steel, propose to adopt than intersecting the intersection section bar of the big diameter of the suitable diameter of section bar.
In this way, discovery is in the strength deficiency of thin-walled property to the transverse direction load that imposes on grid integral body that can remedy by the carrying section bar, can eliminate the reduction problem that problem on deformation behind the welding fabrication and plane keep intensity, performance can be made the effect of the excellent product that meets product specification by the high engineering of productivity ratio as far as possible.
This intersects in the grid of thick diameter performance band flanging of section bar, can realize above-mentioned effect both of carrying section bar and end section bar under the situation of high tension steel.Promptly bring into play in the strength deficiency that remedies the transverse direction load that imposes on grid integral body, the reduction problem that problem on deformation behind the welding fabrication that disappears and plane keep intensity can be separated as far as possible, the effect of the excellent product that meets product specification can be made by the high engineering of productivity ratio.
The various high tension steel grids of the invention described above motion, just from being the stage of the raw-material design of grid with the high tension steel, the high tension steel grid is produced in actual trial-production, make a strength test repeatedly, the repeatedly result of failure of service test produces, realized having adopted the grid of high tension steel, the grid with industrial value is provided particularly with integral body.
[description of drawings]
Fig. 1 a and Fig. 1 b are an embodiment of expression high tension steel grid of the present invention, and wherein Fig. 1 a is its elevation (plan view), and Fig. 1 b is the AA sectional drawing of Fig. 1 a.
Fig. 2 a represents is the sectional drawing of major part of user mode of the high tension steel grid of Fig. 1 a and Fig. 1 b, and Fig. 2 b is the BB sectional drawing of Fig. 2 a.
Fig. 3 a to Fig. 3 c is other embodiment of expression high tension steel grid of the present invention, and wherein Fig. 3 a is the stereoscopic figure of its user mode, and Fig. 3 b is the sectional drawing of its major part, and Fig. 3 c is the C direction of arrow view of Fig. 3 b.
Fig. 4 a to Fig. 4 e is other embodiment of expression high tension steel grid of the present invention, and Fig. 4 a is its elevation, and Fig. 4 b is its plan view, and Fig. 4 c is the DD sectional drawing of Fig. 4 b, and Fig. 4 d is the elevation of its user mode, and Fig. 4 e is the side view of Fig. 4 d.
Description of reference numerals is as follows:
1,1A carrying section bar
2,2A intersection section bar
3,3A end section bar
The 3a vertical component effect
3b bears portion
The 3c support portion
5,5A, 5B high-tension grid
The diameter of d intersection section bar
The plate thickness of tb carrying section bar
The plate thickness of te end section bar
U U font ditch
The UA lateral sulcus
Above the Ua U word ditch
The Ub grid bears portion
The circular lateral sulcus of V
The Va opening
The W grille
[specific embodiment]
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.
(embodiment 1)
Fig. 1 (a) is its elevation (plan view) for an embodiment of expression high tension steel grid of the present invention, (b) is the AA sectional drawing of (a).Fig. 2 (a) is the sectional drawing of major part of user mode of the high tension steel grid of presentation graphs 1, (b) is the BB sectional drawing of (a).
Shown in Fig. 2 (a), this high tension steel grid 5 is the grid of so-called band flanging, the lid that is used for the U font ditch U of road, the carrying section bar 1 of square-section is arranged in parallel under the state of erectting, do not have under the outstanding state from the upper surface of carrying section bar 1 at this intersection section bar 2, form grille W by upset butt welding by the upper end side that intersection section bar 2 connects carrying section bars 1, connect the both ends of carrying section bar 1 respectively by end section bar 3.
This high tension steel grid 5, comprise outside the above-mentioned essential structure, especially be raw material at end section bar 3 with the high tension steel steel plate, by this high tension steel steel plate is carried out plastic working, form the vertical component effect 3a of the two end portions that connects carrying section bar 1, connect together and bear with the end portion of vertical component effect 3a this two end portions lower side the 3b of the portion of bearing and from the upper part of vertical component effect 3a with bear the 3b of portion rightabout with the extended support portion 3c in right angle.
This bears the 3b of portion and support portion 3c shown in Fig. 2 (a), and support portion 3c is positioned over above the ditch of U font ditch U on the Ua, and the portion 3b of bearing bears the two end portions of carrying section bar 1, can bear the load F that imposes on carrying section bar 1 by both.
Like this, in this band flanging grid 5, when the raw material of the intersection section bar 3 that bears the load that imposes on carrying section bar 1 are the high tension steel steel plate, compare as the grid of end section bar with the original end of employing angle steel, patent documentation 2 (the real communique of passing the imperial examinations No. 3033439 of Japan for example, Fig. 1,2 end angle steel 2,2 '), brought into play following effect.
Effect 1: as the steel plate of tolerance with even load, can adopt the more high-tensile steel of book, utilize this thick book degree, can be by the end section bar 3 of the favourable Z font shape of the conduct band flanging grid of plastic working moulding shown in Fig. 2 (a) (by support portion 3a and bear the 3b of portion and constitute).
Consequently, adopting under the situation of original angle steel, because angle steel generally is extrusion modling, suitably select so have only in from the market the specification product, option is restricted.But under the situation that adopts plastic working moulding high-tensile steel, performance can easily be made end section bar 3 as required, can adapt to the effect of the many variety production of small lot.
Effect 2: from Fig. 1 (a), Fig. 2 (a) as can be known, because the portion 3b of bearing diminishes the aperture area of grille W, so the two end portions of bearing carrying section bar 1 in the scope that can bear the load that imposes on carrying section bar 1, can be a small size as far as possible.But, (for example: by the panel beating bending under) the situation,,, can shorten the length of the carrying section bar 1 that bears the 3b of portion, can strengthen the aperture area of grille W so the thickness of plate is got over book because restricted with respect to the plate thickness end size in plastic working.
Specifically, adopt the high tension steel of plate thickness te=1.8mm in the present embodiment as end section bar 3 raw material, at this moment, the portion 3b of bearing can be born the length T at the two ends of carrying section bar 1 and set for about 10mm.In addition, present situation is that the plate thickness as the high tension steel steel plate that can access on the open market comprises above-mentioned 2.3mm to 3.2mm, and the raw material that can be used as the end section bar of grid adopt.But, be not limited to this raw material.
Effect 3: the advantage of further bringing into play above-mentioned book wallization, in this band flanging grid 5, increase the support portion 3c of Ua above the ditch that contacts U font U, can one-body moldedly bear the 3b of the portion of bearing of the following side at the two ends of carrying section bar by adopting high-tensile steel and plastic working, with originally only adopted the end section bar (being also referred to as " end angle steel ") of angle steel to compare, can avoid better because load F carrying section bar 1 comes off from end section bar 3.
In addition, even be set at the situation of the shape of this zigzag at the end section bar, because the plastic working by steel plate can moulding, so, the specification that meets grid, the end section bar that carries the shape of section bar can be easily made, many kinds, small lot batch manufacture can be adapted to.
Effect 4: in this end section bar 3, by adopting tension stress steel steel plate, compare with original, the plate thickness te that exceeds the support portion 3c on road surface can be set for book, to reduce the step difference on road surface, can bring into play and reduce automobile, prevent the effect that the pedestrian falls down easily because step difference produces noise.
And then, this high tension steel grid 5, especially with the high tension steel raw material of carrying section bar 1, the minimum plate thickness (be generally 3mm) of plate thickness tb of its carrying section bar 1 during than the calendering steel that adopt ordinary construction to use is little (plate thickness tb=1.6mm), in order to be suitable for carrying out upset butt welding, the diameter d of section bar 2 of intersecting is set the diameter bigger than suitable diameter (being generally 3mm) (from diameter d=4mm to 5mm) for.
In addition, in the present embodiment, the section bar 2 that intersects adopts and is hexagonal spiral section bar with the round steel of diameter 4mm is helically twisted.But the shape of spiral section bar is not limited thereto, and also can be quadrangle or other shapes.In addition, here the diameter of indication be meant helically twisted before the diameter of round steel.
Like this, if the raw material of carrying section bar 1 are high tension steel, generally when only considering to act on the longitudinal load F of carrying section bar 1, can thin-walled property.But, with respect to the intersect vertically lateral load (for example: on this grid 5, under the state of the tyre load of automobile, the power that the direction of tire was acted on when changing) of direction of this longitudinal load F, have this one side that intensity reduces.
In addition, under the thinner situation of intersection section bar, as the plane maintenance intensity reduction of grid 5 integral body.By overstriking intersection section bar 2, prevent that described intensity with respect to lateral load from reducing, and prevent that this plane from keeping the reduction of intensity in for thin-walled carrying section bar, can have practicality, have industrial value as product.
In addition,, under the situation thicker than suitable diameter, compare with original method when intersection section bar 2 is carried out upset butt welding with respect to the plate thickness that carries section bar 1, the resistance welding condition need be set different conditions.But, be through the repetition test decision.
At this, the so-called high tension steel high tension steel of JIS G3129, G3134, G3135 regulation basically can be suitable for.But, be not limited thereto, comprise about intensity more than 1.5 times of intensity with calendering steel SS400 that original employing ordinary construction uses, generally be called the steel of high tension steel or high strength steel.Have, comprise the steel of the 3-4 intensity doubly of the intensity with SS400 that is called superelevation high tension steel in the high tension steel, for example: tensile strength is the steel about 1500MPa.
When the suitable welding condition that adopts the repetition test result to draw is carried out upset butt welding, carrying section bar 1 with respect to plate thickness 1.6mm, even under the situation of employing than the intersection section bar 2 of thick usually 4.3mm diameter (round steel of helically twisted 4mm is the section bar in hexagon or tetragonal cross section), also can carry out good welding.
In addition, in the present embodiment, understand for example and be not only end section bar 3 that carrying section bar 1 is raw-material situation with high tension steel also.But, as seen from the above description, adopt high tension steel to make the not interdependent bearing type material of end section bar 3 book wall this point raw material can realize that the effect of its book wallization also is to bring into play individually.
(embodiment 2)
Fig. 3 (a) is the stereoscopic figure of its user mode for other embodiment of expression high tension steel grid of the present invention, (b) is the sectional drawing of its major part, (c) is the C direction of arrow view of (b).
In Fig. 3 (a),, be arranged on grid and bear on the Ub of portion though this high tension steel grid 5A represents the lid as road lateral sulcus UA.But, also can be used for other the clean room or the floor of multistorey parking space etc., perhaps be used for the pedal of step.
Its formation is compared with the high tension steel grid 5 shown in Fig. 1,2, difference is: end section bar 3A is born the Ub of portion by the grid of lateral sulcus UA and supports, do not bear the load that imposes on carrying section bar 1, for the ordinary construction steel with common square-section is a raw-material plane section bar.
That is, this high tension steel grid 5A is characterized in that: in the grid of no flanging, only carrying section bar 1 is raw material with the high tension steel, and other intersection section bar 2, end section bar 3A are raw material with the ordinary construction steel.In addition, in the present embodiment, the section bar 2 that intersects directly adopts does not have helically twisted round steel.
In this way, the section bar 2 that will intersect carries out after the upset butt welding with carrying section bar 1, it is few to connect the deflection that produces in the process of end section bar 3A as product, in addition, even producing distortion also corrects easily, as adopting high tension steel is raw-material high tension steel grid 5A, can meet the excellent product of product specification by the high engineering manufacturing of productivity ratio.
In addition, in this high tension steel grid 5A, concern with respect to intersecting plate thickness maintenance and Fig. 1, the 2 identical thicknesses of section bar 2 intersecting aspect the thickness of section bar 2.In this respect can performance the effect identical with Fig. 1,2 high tension steel grid 5.
But, can keep the mode of intensity to set under the situation of the plate thickness that carries section bar to guarantee its transverse strength or plane, it is such the thickness of intersection section bar can be set at original embodiment, can just carry section bar is raw material with the high tension steel, at this moment, be above-mentioned carrying section bar be raw material with the high tension steel, other intersect section bars, the effect when section bar performance in end is raw material with the ordinary construction steel.
(embodiment 3)
Fig. 4 (a) is its elevation for other embodiment of expression high tension steel grid of the present invention, (b) is its plan view, (c) is the DD sectional drawing of (b), (d) is the elevation of its user mode, (e) is the side view of (d).
Shown in Fig. 2 (d), (e), this high tension steel grid 5B is characterized in that: the lid as the opening VA of circular lateral sulcus V adopts with grid, and carrying section bar 1A except that two Outboard Sections 1B and the raw material of section bar 2A of intersecting are high tension steel.In addition, Reference numeral 3B is the end section bar.
Promptly, compare with the high-tension grid 5 of Fig. 1, difference is: this one side of elongated open WA that is used for circular lateral sulcus W under vertical ordered state, and be not only carrying section bar 1A, and intersection section bar 2A also is the high tension steel of square-section, be provided with the ditch that intersection section bar 2A is embedded carrying section bar 1A, this one side that both are welded to connect by usual way.
High tension steel grid 5A according to above-mentioned formation, because mainly be that to bear the carrying section bar 1A of the loading section that imposes on grid 5B and intersect section bar 2A be raw material with the high tension steel, so, can become book (for example: be about 1/3rd) corresponding to their thickness of its intensity, the result can reduce to overall weight about original half.
In addition,, do not change appearance and size, aperture opening ratio, can improve intensity if set suitable plate thickness.
The high-tension grid 5 of above-mentioned three embodiment, 5A, 5B have distinguishing characteristics shown in above-mentioned and corresponding action effect respectively.But, just from being the stage of the raw-material design of grid with the high tension steel, in fact the high tension steel grid is produced in trial-production, make a strength test repeatedly, the repeatedly result of failure of service test produces, adopted the grid of high tension steel with integral body, the grid with industrial value is provided particularly.
In addition, high tension steel grid of the present invention is not limited to above-mentioned embodiment (embodiment).In addition, in the scope of the scope of the claim of patent record and embodiment (embodiment), various variation, combination can be arranged.
High strength steel grid of the present invention at the industrial field that requires to provide particularly the grid with industrial value, particularly can be used for the floor of operculum colpi or clean room or multistorey parking space etc. or the pedal of step as the grid that adopts high strength steel.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (2)
1. high tension steel grid, the lid that is used for road lateral sulcus etc., described grid is included in the carrying section bar of the square-section that is arranged in parallel under the state of setting, do not have under the outstanding state from the upper surface of described carrying section bar at described intersection section bar, adopt upset butt welding to connect the upper end side of described carrying section bar and form grille by the intersection section bar, with the both ends that are connected described carrying section bar by the end section bar, it is characterized in that: described end section bar is raw material with the high tension steel steel plate, by this high tension steel steel plate is carried out plastic working, form the vertical component effect of the two end portions that connects described carrying section bar, connect together with the end portion of described vertical component effect and bear the portion of bearing of the lower side of this two end portions, with from the upper part of described vertical component effect and the described portion's rightabout that bears with extended support portion, right angle, bear portion and the load that imposes on described carrying section bar can be born in described support portion by described.
2. high tension steel grid according to claim 1, it is characterized in that: at carrying section bar raw material is high tension steel, the plate thickness ratio employing ordinary construction of its carrying section bar is used under the little situation of the minimum plate thickness when rolling steel, intersect the section bar diameter greater than suitable diameter, to be suitable for carrying out upset butt welding.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010116517.9A CN102140821B (en) | 2010-01-29 | 2010-01-29 | High-tension steel grating |
| HK11110441.1A HK1159201A1 (en) | 2010-01-29 | 2011-10-03 | High tensile steel grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010116517.9A CN102140821B (en) | 2010-01-29 | 2010-01-29 | High-tension steel grating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102140821A true CN102140821A (en) | 2011-08-03 |
| CN102140821B CN102140821B (en) | 2014-03-26 |
Family
ID=44408597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010116517.9A Active CN102140821B (en) | 2010-01-29 | 2010-01-29 | High-tension steel grating |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102140821B (en) |
| HK (1) | HK1159201A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110615066A (en) * | 2019-10-10 | 2019-12-27 | 中船黄埔文冲船舶有限公司 | Ship and seabed door grating thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5129625Y2 (en) * | 1971-10-13 | 1976-07-26 | ||
| JPH08252601A (en) * | 1995-03-15 | 1996-10-01 | Nippon Kinzoku Co Ltd | Member for structure and manufacture thereof |
| JP2002356760A (en) * | 2001-03-30 | 2002-12-13 | Nisshin Steel Co Ltd | Material for civil-engineering and member for civil- engineering having excellent corrosion resistance |
| JP2009057750A (en) * | 2007-08-31 | 2009-03-19 | Takara Kizai:Kk | High-tension steel grating |
| CN101631917A (en) * | 2006-10-30 | 2010-01-20 | 阿考塞弗林阿尔曼有限公司 | Grating |
-
2010
- 2010-01-29 CN CN201010116517.9A patent/CN102140821B/en active Active
-
2011
- 2011-10-03 HK HK11110441.1A patent/HK1159201A1/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5129625Y2 (en) * | 1971-10-13 | 1976-07-26 | ||
| JPH08252601A (en) * | 1995-03-15 | 1996-10-01 | Nippon Kinzoku Co Ltd | Member for structure and manufacture thereof |
| JP2002356760A (en) * | 2001-03-30 | 2002-12-13 | Nisshin Steel Co Ltd | Material for civil-engineering and member for civil- engineering having excellent corrosion resistance |
| CN101631917A (en) * | 2006-10-30 | 2010-01-20 | 阿考塞弗林阿尔曼有限公司 | Grating |
| JP2009057750A (en) * | 2007-08-31 | 2009-03-19 | Takara Kizai:Kk | High-tension steel grating |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110615066A (en) * | 2019-10-10 | 2019-12-27 | 中船黄埔文冲船舶有限公司 | Ship and seabed door grating thereof |
| CN110615066B (en) * | 2019-10-10 | 2021-12-28 | 中船黄埔文冲船舶有限公司 | Ship and seabed door grating thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| HK1159201A1 (en) | 2012-07-27 |
| CN102140821B (en) | 2014-03-26 |
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