CN109183550B - Rapid turnover temporary road laying method - Google Patents
Rapid turnover temporary road laying method Download PDFInfo
- Publication number
- CN109183550B CN109183550B CN201811174138.8A CN201811174138A CN109183550B CN 109183550 B CN109183550 B CN 109183550B CN 201811174138 A CN201811174138 A CN 201811174138A CN 109183550 B CN109183550 B CN 109183550B
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- China
- Prior art keywords
- concrete pavement
- steel
- pavement slab
- turnover
- prefabricated
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- Expired - Fee Related
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C9/00—Special pavings; Pavings for special parts of roads or airfields
- E01C9/08—Temporary pavings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/52—Apparatus for laying individual preformed surfacing elements, e.g. kerbstones
- E01C19/526—Apparatus for laying individual preformed surfacing elements, e.g. kerbstones hand operated
- E01C19/528—Apparatus for laying individual preformed surfacing elements, e.g. kerbstones hand operated with wheels
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C9/00—Special pavings; Pavings for special parts of roads or airfields
- E01C9/08—Temporary pavings
- E01C9/086—Temporary pavings made of concrete, wood, bitumen, rubber or synthetic material or a combination thereof
Abstract
The invention discloses a quick and turnover temporary road paving method, which comprises the following specific steps: the angle steel on the prefabricated concrete pavement slab that can have enough to meet the need welds into the frame of prefabricated concrete pavement slab that can have enough to meet the need, the reinforcing bar is good with pre-buried carrying handle bar in the frame ligature, prefabricated concrete pavement slab that can have enough to meet the need adopts the tertiary steel interval 150mm individual layer two-way arrangement of diameter 16mm, will prop up at the bottom surface of frame after the reinforcing bar ligature, the four sides establishes the template and will reserve the lifting hole and set up, then adopt C30 concrete placement to demolish the template after the shaping, the square steel pipe, the steel handle, fixed pull ring, the iron chain welds into the skeleton of moving tool car mutually. The invention has the beneficial effects that: the method is convenient, simple and easy to operate, can quickly lay the temporary road of the construction site, can be used in a turnover mode, saves labor, materials and construction period, reduces environmental pollution, and is more convenient and quicker to assemble or disassemble the movable tool vehicle and the turnover concrete pavement slab.
Description
Technical Field
The invention relates to a paving method, in particular to a quick and turnover temporary road paving method, and belongs to the technical field of temporary road paving method application.
Background
In building engineering's work progress, the temporary road is the site operation indispensable, be the road that the construction unit was done for construction work convenience, the temporary road plays important effect in the work progress, traditional temporary road adopts reinforced concrete to lay, because the very big temporary road of vehicle load takes place the damage easily in the use, the temporary road will carry out the breakage after the construction and demolish the use that can not have enough to meet the need, the tradition mode consumes time, manual work, the material, and the environment causes great pollution.
Disclosure of Invention
The invention aims to solve the problems that a traditional temporary road is paved by reinforced concrete, the temporary road is easy to damage due to large vehicle load in the using process, the temporary road needs to be broken and dismantled after construction is finished and can not be recycled, the traditional mode consumes time, labor and materials, and the environment causes large pollution, and provides a rapid recyclable temporary road paving method.
The purpose of the invention can be realized by the following technical scheme: a quick and turnover temporary road paving method specifically comprises the following steps:
the method comprises the following steps: welding angle steel on the prefabricated recyclable concrete pavement slab into a frame of the prefabricated recyclable concrete pavement slab, binding steel bars and pre-embedded lifting steel bars in the frame, arranging the prefabricated recyclable concrete pavement slab in a single-layer bidirectional mode with a diameter of 16mm and a three-level steel spacing of 150mm, erecting templates on the bottom surface and four surfaces of the frame after binding the steel bars, setting reserved lifting holes, and then removing the templates after pouring and forming by adopting C30 concrete;
step two: the square steel pipe, the steel handle, the fixed pull ring, the iron chain and the hoisting hook are mutually welded into a framework of the mobile tool car, and a rubber wheel and a fixed bearing are arranged at the lower part of the mobile tool car and are used as a mobile tool of the mobile tool car;
step three: when the movable tool vehicle is used in cooperation with a prefabricated turnover concrete pavement slab, an operator holds a steel handle to firstly hang the movable tool vehicle, which tilts forward, on an embedded lifting steel bar in front of the prefabricated turnover concrete pavement slab by using a front lifting hook;
step four: after the lifting hook is hung, the movable tool vehicle is inclined backwards to the rear of the movable tool vehicle, and the lifting hook is hung on the pre-buried lifting steel bar behind the prefabricated turnover concrete pavement slab;
step five: after the temporary road is hung, the moving tool vehicle is horizontally placed, and then the temporary road can be laid after the prefabricated turnable concrete pavement slab is manually moved.
The invention has the further technical improvement scheme that: the prefabricated turnover concrete pavement slab in the step one comprises angle steel, reserved lifting holes, pre-embedded lifting steel bars and concrete, the prefabricated turnover concrete pavement slab is of a cuboid structure, and the concrete is filled in the prefabricated turnover concrete pavement slab;
the edge of each of four sides of the concrete is sleeved with an angle steel, the edge of the concrete is wrapped and fixed by the angle steel, the concrete is prevented from being cracked when the concrete is used, the overall strength and the service life of a pavement slab are improved, circular reserved lifting holes are formed in two ends of the upper end face of the prefabricated recyclable concrete pavement slab, and pre-buried lifting steel bars are arranged in the reserved lifting holes.
The invention has the further technical improvement scheme that: two pre-buried lifting steel bar middle part sets up all has the arch, protruding top is convex structure, and protruding middle part is hollow structure, through protruding and jack-up couple butt joint, makes things convenient for the staff to pass through iron chain pulling concrete decking front and back upset regulation removal.
The invention has the further technical improvement scheme that: the moving tool car in the second step comprises a square steel pipe, a steel handle, a fixed pull ring, an iron chain, a hoisting hook, a rubber wheel and a fixed bearing;
longitudinal steel pipes are vertically arranged at two ends of the middle of the square steel pipe, steel handles are vertically arranged on the side walls of two sides of two ends of the square steel pipe, fixed pull rings are arranged at two ends of the bottom of the square steel pipe, iron chains are longitudinally sleeved below the two fixed pull rings, and lifting hooks are arranged at the bottoms of the two iron chains;
and circular fixed bearings are arranged below the side walls of the longitudinal steel pipes, and circular rubber wheels are sleeved on the fixed bearings.
The invention has the further technical improvement scheme that: the fixed pull ring is of a hollow structure, the fixed bearing penetrates through the circle center at the middle part of the rubber wheel, the rubber wheel is rotatably connected with the fixed bearing, and the fixed bearing is matched with the rubber wheel to rotate, so that the rubber wheel rotates more stably and smoothly, and the moving tool car is more stable when moving.
The invention has the further technical improvement scheme that: the two embedded lifting steel bars are respectively matched with the two hoisting hooks, and the hoisting hooks are hung in the bulges in the middle of the embedded lifting steel bars.
The invention has the further technical improvement scheme that: the square steel pipe is movably connected with the embedded lifting steel bar through the lifting hook.
Compared with the prior art, the invention has the beneficial effects that:
1. the method adopts C concrete pouring for the turnable concrete pavement slab, adopts angle steel as the edge guard and the corner guard at the periphery, adopts a movable tool vehicle which is welded by square steel pipes to form a tool vehicle framework, adopts two rubber wheels as the lower part, and is provided with iron chains with lifting hooks at the front and the rear, when the movable tool vehicle is used for transporting the turnable concrete pavement slab, the tool vehicle is inclined forwards, the front lifting hook is hung on the embedded lifting steel bar of the turnable concrete pavement slab, then the tool vehicle is inclined backwards, the rear lifting hook is hung on the embedded lifting steel bar of the turnable concrete pavement slab, and then the movable tool vehicle is kept in a horizontal state, so that an operator can move the heavy prefabricated turnable concrete pavement slab, the method is convenient, simple and easy to operate, and can quickly lay a temporary road of a construction site, and the device can be used in a circulating way, so that the labor, materials and construction period are saved, and the environmental pollution is reduced.
2. According to the method, the front lifting hook of the movable tool car is hung on the embedded lifting steel bar of the turnover concrete pavement slab, then the movable tool car is tilted backwards, the rear lifting hook is hung on the embedded lifting steel bar of the turnover concrete pavement slab, then the movable tool car is kept in a horizontal state, an operator can move the heavy prefabricated turnover concrete pavement slab, and the movable tool car and the turnover concrete pavement slab in the method can be assembled and assembled more conveniently and quickly; the invention has good social benefit and is suitable for popularization and use.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a top view of a prefabricated turnover concrete pavement slab of the present invention.
Fig. 2 is a side view of a precast turnaround concrete deck of the present invention.
Fig. 3 is a left side view of the precast turnable concrete pavement slab of the present invention.
3 fig. 3 4 3 is 3 a 3 cross 3- 3 sectional 3 view 3 a 3- 3 a 3 of 3 the 3 prefabricated 3 turnover 3 concrete 3 pavement 3 slab 3 of 3 the 3 present 3 invention 3. 3
Fig. 5 is a schematic view of the embedded lifting steel bar of the present invention.
Fig. 6 is a front view of the mobile tool cart of the present invention.
Fig. 7 is a top view of the mobile tool cart of the present invention.
FIG. 8 is a schematic view of the third step of lifting and prefabricating the turnover concrete pavement slab by the mobile tool vehicle.
Fig. 9 is a schematic diagram of the fourth step of lifting and prefabricating the turnover concrete pavement slab by the mobile tool vehicle.
Fig. 10 is a schematic diagram of the temporary road construction by lifting the prefabricated turnable concrete road slab by the mobile tool vehicle.
In the figure: 1. angle steel; 2. a square steel pipe; 3. a steel handle; 4. fixing a pull ring; 5. an iron chain; 6. a lifting hook; 7. a rubber wheel; 8. fixing the bearing; 9. reserving a lifting hole; 10. embedding lifting steel bars; 11. and (3) concrete.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 10, a method for laying a temporary road which is fast and has enough circulation includes the following steps:
the method comprises the following steps: welding angle steel 1 on the prefabricated recyclable concrete pavement slab into a frame of the prefabricated recyclable concrete pavement slab, binding steel bars and pre-embedded lifting steel bars 10 in the frame, arranging the prefabricated recyclable concrete pavement slab in a single-layer bidirectional mode with a diameter of 16mm and a three-level steel spacing of 150mm, erecting templates on the bottom surface and four surfaces of the frame after binding the steel bars, arranging reserved lifting holes 9, and then removing the templates after pouring and forming by adopting C30 concrete;
step two: the square steel tube 2, the steel handle 3, the fixed pull ring 4, the iron chain 5 and the hoisting hook 6 are mutually welded into a framework of the mobile tool car, and the lower part of the mobile tool car is provided with a rubber wheel 7 and a fixed bearing 8 which are used as mobile tools of the mobile tool car;
step three: in the using process, the movable tool vehicle is matched with a prefabricated turnover concrete pavement slab for use, an operator holds the steel handle 3 and firstly hangs the movable tool vehicle, which leans forward, on the pre-embedded lifting steel bar 10 in front of the prefabricated turnover concrete pavement slab by using the front lifting hook 6;
step four: after the hanging, a lifting hook 6 which is arranged at the rear part of the movable tool vehicle is inclined backwards to hang on an embedded lifting steel bar 10 at the rear part of the prefabricated turnover concrete pavement slab;
step five: after the temporary road is hung, the moving tool vehicle is horizontally placed, and then the temporary road can be laid after the prefabricated turnable concrete pavement slab is manually moved.
Referring to fig. 1-5, the prefabricated recyclable concrete pavement slab in the first step comprises angle steel 1, reserved lifting holes 9, pre-embedded lifting steel bars 10 and concrete 11, the prefabricated recyclable concrete pavement slab is of a cuboid structure, and the concrete 11 is filled in the prefabricated recyclable concrete pavement slab;
As a technical optimization scheme of the invention, the middle parts of two embedded lifting steel bars 10 are respectively provided with a bulge, the top parts of the bulges are of an arc structure, the middle parts of the bulges are of a hollow structure, and the bulges are butted with a lifting hook 6, so that a worker can conveniently pull a concrete pavement slab to turn back and forth through an iron chain 5 to adjust the movement.
Referring to fig. 6-10, the mobile tool car in the second step includes a square steel tube 2, a steel handle 3, a fixed pull ring 4, an iron chain 5, a lifting hook 6, a rubber wheel 7 and a fixed bearing 8;
longitudinal steel pipes are vertically arranged at two ends of the middle of the square steel pipe 2, steel handles 3 are vertically arranged on the side walls of two sides of two ends of the square steel pipe 2, fixed pull rings 4 are arranged at two ends of the bottom of the square steel pipe 2, iron chains 5 are longitudinally sleeved below the two fixed pull rings 4, and hoisting hooks 6 are arranged at the bottoms of the two iron chains 5;
wherein, two indulge steel pipe lateral wall below and all be provided with circular shape fixing bearing 8, all overlap on two fixing bearing 8 and be equipped with circular shape rubber wheel 7.
As a technical optimization scheme of the invention, the fixed pull ring 4 is of a hollow structure, the fixed bearing 8 penetrates through the center of a circle in the middle of the rubber wheel 7, the rubber wheel 7 is rotatably connected with the fixed bearing 8, and the fixed bearing 8 is matched with the rubber wheel 7 to rotate, so that the rubber wheel 7 rotates more stably and smoothly, and the moving tool car moves more stably.
As a technical optimization scheme of the invention, two embedded lifting steel bars 10 are respectively matched with two hoisting hooks 6, and the hoisting hooks 6 are hung in the bulges at the middle parts of the embedded lifting steel bars 10.
As a technical optimization scheme of the invention, the square steel pipe 2 is movably connected with the embedded lifting steel bar 10 through the lifting hook 6.
Compared with the prior art, the invention has the beneficial effects that:
1. the method adopts C30 concrete for pouring the turnable concrete pavement slab, adopts angle steel 1 as a protective edge and a protective corner around, adopts a mobile tool vehicle which is welded by square steel pipes 2 to form a tool vehicle framework, adopts two rubber wheels 7 as a mobile tool at the lower part, and is hung with iron chains 5 with lifting hooks 6 at the front and the rear parts, when the mobile tool vehicle is used for carrying the turnable concrete pavement slab, the tool vehicle is inclined forwards, the front lifting hook 6 is hung on the embedded lifting steel bar 10 of the turnable concrete pavement slab, then the tool vehicle is inclined backwards, the rear lifting hook 6 is hung on the embedded lifting steel bar 10 of the turnable concrete pavement slab, then the mobile tool vehicle is kept in a horizontal state, and an operator can move the heavy prefabricated turnable concrete pavement slab, the method is convenient, simple and easy to operate, and can quickly lay a temporary road of a construction site, and the device can be used in a turnover manner, so that the labor, materials and construction period are saved, and meanwhile, the environmental pollution is reduced.
2. According to the method, the front lifting hook 6 of the movable tool car is hung on the embedded lifting steel bar 10 of the turnover concrete pavement slab, then the movable tool car is tilted backwards, the rear lifting hook 6 is hung on the embedded lifting steel bar 10 of the turnover concrete pavement slab, then the movable tool car is kept in a horizontal state, an operator can move the heavy prefabricated turnover concrete pavement slab, and the movable tool car and the turnover concrete pavement slab in the method can be assembled and assembled conveniently or disassembled more conveniently and quickly; the invention has good social benefit and is suitable for popularization and use.
When the movable tool car is used, firstly, the safety of the method in use is checked, then, a square steel pipe 2, a steel handle 3, a fixed pull ring 4, an iron chain 5 and a hoisting hook 6 are mutually welded to form a framework of the movable tool car, and a rubber wheel 7 and a fixed bearing 8 are arranged at the lower part of the movable tool car and are used as a movable tool of the movable tool car;
in the using process, the movable tool vehicle is matched with a prefabricated turnover concrete pavement slab for use, an operator holds the steel handle 3 and firstly hangs the movable tool vehicle, which leans forward, on the pre-embedded lifting steel bar 10 in front of the prefabricated turnover concrete pavement slab by using the front lifting hook 6;
after the hanging, a lifting hook 6 which is arranged at the rear part of the movable tool vehicle is inclined backwards to hang on an embedded lifting steel bar 10 at the rear part of the prefabricated turnover concrete pavement slab;
after the temporary road is hung, the moving tool vehicle is horizontally placed, and then the temporary road can be laid after the prefabricated turnable concrete pavement slab is manually moved.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. A quick and turnover temporary road paving method is characterized by comprising the following steps:
the method comprises the following steps: welding angle steel (1) on the prefabricated recyclable concrete pavement slab into a frame of the prefabricated recyclable concrete pavement slab, binding steel bars and pre-embedding lifting steel bars (10) in the frame, wherein the prefabricated recyclable concrete pavement slab adopts a single-layer bidirectional arrangement with a diameter of 16mm and a three-level steel spacing of 150mm, erecting templates on the bottom surface and four surfaces of the frame after the steel bars are bound, setting reserved lifting holes (9), and then removing the templates after C30 concrete is poured and molded;
step two: a square steel pipe (2), a steel handle (3), a fixed pull ring (4), an iron chain (5) and a hoisting hook (6) are mutually welded into a framework of the mobile tool car, and a rubber wheel (7) and a fixed bearing (8) are arranged at the lower part of the mobile tool car and are used as a mobile tool of the mobile tool car;
step three: in the using process, the movable tool vehicle is matched with a prefabricated turnover concrete pavement slab for use, an operator holds the steel handle (3) to hang the movable tool vehicle forwards on an embedded lifting steel bar (10) in front of the prefabricated turnover concrete pavement slab by using a front lifting hook (6);
step four: after the hanging, the movable tool vehicle is inclined backwards to a lifting hook (6) at the rear part of the movable tool vehicle to be hung on an embedded lifting steel bar (10) at the rear part of the prefabricated turnover concrete pavement slab;
step five: after the movable tool vehicle is hung, the movable tool vehicle can be horizontally placed, and then temporary roads can be paved after prefabricated turnable concrete pavement slabs are manually moved;
the moving tool car in the second step comprises a square steel pipe (2), a steel handle (3), a fixed pull ring (4), an iron chain (5), a hoisting hook (6), a rubber wheel (7) and a fixed bearing (8);
longitudinal steel pipes are vertically arranged at two ends of the middle of the square steel pipe (2), steel handles (3) are vertically arranged on the side walls of two sides of two ends of the square steel pipe (2), fixed pull rings (4) are arranged at two ends of the bottom of the square steel pipe (2), iron chains (5) are longitudinally sleeved below the two fixed pull rings (4), and hoisting hooks (6) are arranged at the bottoms of the two iron chains (5);
and circular fixed bearings (8) are arranged below the side walls of the longitudinal steel pipes, and circular rubber wheels (7) are sleeved on the fixed bearings (8).
2. The method for laying the rapid turnover temporary road as claimed in claim 1, wherein the prefabricated turnover concrete pavement slab in the first step comprises angle steel (1), reserved lifting holes (9), embedded lifting steel bars (10) and concrete (11), the prefabricated turnover concrete pavement slab is of a cuboid structure, and the concrete (11) is filled in the prefabricated turnover concrete pavement slab;
the edge of each of the four sides of the concrete (11) is sleeved with an angle steel (1), two ends of the upper end face of the prefabricated turnover concrete pavement slab are provided with circular reserved lifting holes (9), and embedded lifting steel bars (10) are arranged in the two reserved lifting holes (9).
3. The quick temporary road paving method capable of being turned over according to claim 2, wherein protrusions are arranged in the middle of the two embedded lifting steel bars (10), the tops of the protrusions are of circular arc structures, and the middle of each protrusion is of a hollow structure.
4. The quick turnover temporary road paving method according to claim 3, characterized in that the fixed pull ring (4) is of a hollow structure, the fixed bearing (8) is installed at the center of a circle in the middle of the rubber wheel (7) in a penetrating manner, and the rubber wheel (7) is rotatably connected with the fixed bearing (8).
5. The quick turnover temporary road paving method as claimed in claim 1 or 3, wherein two embedded lifting steel bars (10) are respectively matched with the two hoisting hooks (6), and the hoisting hooks (6) are hooked into the bulges at the middle parts of the embedded lifting steel bars (10).
6. The quick turnover temporary road paving method as claimed in claim 1 or 2, wherein the square steel pipe (2) is movably connected with the embedded lifting steel bar (10) through a lifting hook (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811174138.8A CN109183550B (en) | 2018-10-09 | 2018-10-09 | Rapid turnover temporary road laying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811174138.8A CN109183550B (en) | 2018-10-09 | 2018-10-09 | Rapid turnover temporary road laying method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109183550A CN109183550A (en) | 2019-01-11 |
| CN109183550B true CN109183550B (en) | 2020-12-29 |
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ID=64947623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811174138.8A Expired - Fee Related CN109183550B (en) | 2018-10-09 | 2018-10-09 | Rapid turnover temporary road laying method |
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| Country | Link |
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| CN (1) | CN109183550B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111576157A (en) * | 2020-05-25 | 2020-08-25 | 中铁建大桥工程局集团第四工程有限公司 | Rapid and green hardening method for temporary construction site |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE464572B (en) * | 1989-10-19 | 1991-05-13 | Ingemar Friare | APPLIANCES FOR LIFTING AND TRANSPORTING MISCELLANEOUS AND SIMILAR GOODS |
| CN102619152A (en) * | 2012-03-08 | 2012-08-01 | 中天建设集团有限公司 | Split mounting type prefabricated reinforced concrete construction temporary road |
| CN203229860U (en) * | 2013-04-29 | 2013-10-09 | 中核华泰建设有限公司 | Heavy road curb mounting assistant trolley |
| CN206693017U (en) * | 2017-05-10 | 2017-12-01 | 中国水利水电第五工程局有限公司 | A kind of mesopore kerbstone installation tool |
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2018
- 2018-10-09 CN CN201811174138.8A patent/CN109183550B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN109183550A (en) | 2019-01-11 |
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