CN104307888A - Equipment and method for controlling convexity of heavy and medium plate rolling mill working roll - Google Patents
Equipment and method for controlling convexity of heavy and medium plate rolling mill working roll Download PDFInfo
- Publication number
- CN104307888A CN104307888A CN201410528608.1A CN201410528608A CN104307888A CN 104307888 A CN104307888 A CN 104307888A CN 201410528608 A CN201410528608 A CN 201410528608A CN 104307888 A CN104307888 A CN 104307888A
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- Prior art keywords
- cooling water
- working roll
- water collector
- heavy
- medium plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
- B21B37/32—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by cooling, heating or lubricating the rolls
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a method for controlling the convexity of a heavy and medium plate rolling mill working roll. An upper working roll inlet cooling water collecting pipe and an upper working roll outlet cooling water collecting pipe are separated into three cavities; at least one nozzle is formed in each cavity; the nozzles of the three cavities of the upper working roll inlet cooling water collecting pipe respectively face the two ends and the middle section of an upper working roll; the nozzles of the three cavities of the upper working roll outlet cooling water collecting pipe respectively face the two ends and the middle section of the upper working roll; at least one water inlet is formed in each cavity and is respectively connected with a water supply system; a third flow rate adjusting valve and a fourth flow rate adjusting valve are respectively arranged on a communicating pipeline; the third flow rate adjusting valve controls the flow rate of cooling water in the cavity in the middle of the upper working roll inlet cooling water collecting pipe to be not greater than the flow rate of cooling water in the cavities at the two ends of the upper working roll inlet cooling water collecting pipe; the fourth flow rate adjusting valve controls the flow rate of cooling water in the cavity in the middle of the upper working roll outlet cooling water collecting pipe to be not greater than the flow rate of cooling water in the cavities at the two ends of the upper working roll outlet cooling water collecting pipe.
Description
Technical field
The present invention relates to a kind of heavy and medium plate mill work roll crown control appliance and method thereof, be applicable to hot rolled steel plate production line.
Background technology
As depicted in figs. 1 and 2, on hot rolled steel plate production line, steel plate is in the operation of rolling, and mill rolling force is all finally be applied to steel plate by operation roll of mill, thus makes steel plate compression distortion meet the requirements of steel plate thickness.Meanwhile, steel plate gives operation roll of mill reaction force again, and this reaction force makes operation roll of mill produce elastic bending deflection, thus makes mill roll-gap narrowing toward each end broad in the middle, and the steel plate that rolling is become a useful person middle will be thicker than both sides.Working roll all can design a convexity in grinding roller process, but along with rolling grinding, work roll crown gradually changes.Direct impact is like this exactly thicker than both sides in the middle of product, and also create plate crown, convexity is larger larger to Plate Production side's cost impact.
Summary of the invention
In order to overcome this problem, the invention provides a kind of heavy and medium plate mill work roll crown control appliance and method thereof, applying this equipment, sectional-regulated by operation roll of mill cooling water, realize the object controlling work roll crown.
The technical solution adopted for the present invention to solve the technical problems is: a kind of heavy and medium plate mill work roll crown control appliance, the arrival end of heavy and medium plate mill is provided with top working roll entrance cooling water collector, and the port of export of this heavy and medium plate mill is provided with top working roll outlet cooling water collector; It is three cavitys that this top working roll entrance cooling water collector and top working roll export that cooling water collector is all cut off, each cavity respectively establishes at least one nozzle, and the nozzle of three cavitys of this top working roll entrance cooling water collector is respectively towards two ends and the stage casing of this top working roll, the nozzle of three cavitys of this top working roll outlet cooling water collector is respectively towards two ends and the stage casing of this top working roll; Each cavity respectively establishes at least one water inlet, this water inlet is connected with water system respectively, the branch road be communicated with the middle chamber of this top working roll entrance cooling water collector is provided with the 3rd flow control valve, the 4th flow control valve on the branch road that the middle chamber exporting cooling water collector with this top working roll is communicated with.
Further, the branch road be communicated with the middle chamber of this top working roll entrance cooling water collector and the branch road be communicated with the middle chamber that this top working roll exports cooling water collector cross, and are communicated with watering by a pipeline, and this pipeline is provided with first flow control valve.
Further, the water place that enters of this first flow control valve is provided with first-class gauge.
Particularly, the spraying width of the middle chamber of this top working roll entrance cooling water collector is not more than the spraying width of the middle chamber of this top working roll outlet cooling water collector.
Further, the arrival end of this heavy and medium plate mill is provided with bottom working roll entrance cooling water collector, the port of export bottom working roll outlet cooling water collector of this heavy and medium plate mill, this bottom working roll entrance cooling water collector and bottom working roll outlet cooling water collector are respectively provided with at least one nozzle, this nozzle is all towards this bottom working roll, this bottom working roll entrance cooling water collector and bottom working roll outlet cooling water collector respectively establish at least one water inlet, this water inlet is crossed by pipeline, and be connected with watering, it flows pipeline altogether and is provided with second adjustable valve.
Further, this water system is provided with at least one self-cleaning filter.
Another technical scheme as technical solution problem of the present invention: a kind of method using described heavy and medium plate mill work roll crown control appliance, the cooling water flow of the middle chamber of this top working roll entrance cooling water collector of the 3rd Flux Valve Control is not more than the cooling water flow of its two ends cavity, and the cooling water flow of the middle chamber of the 4th this top working roll of Flux Valve Control outlet cooling water collector is not more than the cooling water flow of its two ends cavity.
Further, the arrival end of this heavy and medium plate mill is provided with bottom working roll entrance cooling water collector, the port of export bottom working roll outlet cooling water collector of this heavy and medium plate mill, this bottom working roll entrance cooling water collector and bottom working roll outlet cooling water collector are respectively provided with at least one nozzle, its nozzle is all towards this bottom working roll, this bottom working roll entrance cooling water collector and bottom working roll outlet cooling water collector respectively establish at least one water inlet, this water inlet is connected with water system respectively, its connecting pipeline is provided with second adjustable valve, it controls this bottom working roll entrance cooling water collector and bottom working roll outlet cooling water collector.
Compared with prior art, there is following good effect: 1, by the control to top working roll cooling water total Water, and the independence of the water yield of the interlude of the arrival end of heavy and medium plate mill and the top working roll of the port of export is regulated, thus the temperature realizing each section of top working roll is adjustable, according to principle of expanding with heat and contracting with cold, make the temperature of the interlude of top working roll suitably higher, the roller footpath at place is bigger than normal relative to both sides, thus the control realized work roll crown, ton steel metal consumption object is effectively controlled, cost declining Be very effective to reach.
Below in conjunction with drawings and Examples, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is that the working roll of milling train is without convexity schematic diagram.
Fig. 2 is that the working roll of milling train has convexity schematic diagram.
Fig. 3 rolls working roll bar cooling water collector to arrange schematic diagram.
Fig. 4 is top working roll entrance cooling water manifold construction schematic diagram.
Fig. 5 is water system piping schematic.
Detailed description of the invention
As shown in Figure 3, this heavy and medium plate mill comprises top backing up roll 10, lower support roll 11, top working roll 20, bottom working roll 21, water system and many cooling water collectors, top working roll 20 and bottom working roll 21 is clamped between top backing up roll 10 and lower support roll 11, slab 1 passes through from the gap between top working roll 20 and bottom working roll 21, slab 1 one end entered between top working roll 20 and bottom working roll 21 is the arrival end of heavy and medium plate mill, and one end that slab 1 is extruded is the port of export of heavy and medium plate mill.
Described cooling water collector comprises top working roll entrance cooling water collector 30, top working roll outlet cooling water collector 32, bottom working roll entrance cooling water collector 31 and bottom working roll outlet cooling water collector 33.
As shown in Figure 4, it is identical that top working roll entrance cooling water collector 30 and top working roll export cooling water collector 32 structure, its blind pipe all closed for two ends, be provided with two in its pipe and cut off 301, these two are cut off 301 and are divided into three cavitys do not communicated 302, and the cross-sectional area of each cavity 302 is identical with the cross section size of former blind pipe.The sidewall of each cavity 302 is above-listed establishes multiple nozzle 303, and the sidewall opposite side of each cavity 302 is also provided with at least one water inlet, and water inlet communicates with water system end.It is identical that bottom working roll entrance cooling water collector 31 and bottom working roll export cooling water collector 33 structure, its blind pipe all closed for two ends, its sidewall is above-listed establishes multiple nozzle 303, and its sidewall opposite side is also provided with at least one water inlet, and water inlet communicates with water system end.
Top working roll entrance cooling water collector 30 is located at the oblique upper of the arrival end of heavy and medium plate mill, and the axial line of top working roll entrance cooling water collector 30 is substantially parallel with top working roll 20 axial line, the nozzle 303 of top working roll entrance cooling water collector 30 is all towards this top working roll 20; Top working roll outlet cooling water collector 32 is located at the oblique upper of the port of export of heavy and medium plate mill, and the axial line of top working roll outlet cooling water collector 32 is substantially parallel with top working roll 20 axial line, the nozzle 303 of top working roll outlet cooling water collector 32 is all towards this top working roll 20; Bottom working roll entrance cooling water collector 31 is located at the oblique below of the arrival end of heavy and medium plate mill, and the axial line of bottom working roll entrance cooling water collector 31 is substantially parallel with bottom working roll 21 axial line, the nozzle 303 of bottom working roll entrance cooling water collector 31 is all towards this bottom working roll 21; Bottom working roll outlet cooling water collector 33 is located at the oblique below of the port of export of heavy and medium plate mill, and the axial line of bottom working roll outlet cooling water collector 33 is substantially parallel with bottom working roll 21 axial line, the nozzle 303 of bottom working roll outlet cooling water collector 33 is all towards this bottom working roll 21.
As shown in Figure 5, this water system originates from watering 100, and the outlet pipe of watering 100 splits into the first branch road and the second branch road.
The pipeline of the first branch road is until stage casing, it is four pipelines by single pipeline flow dividing, these four pipelines are the first output branch road respectively, second exports branch road, 3rd exports branch road and the 4th exports branch road, first exports branch road is connected with the water inlet of the cavity 302 of the centre of top working roll entrance cooling water collector 30 and supplies water to it, second exports branch road is connected with the water inlet of the cavity 302 at the two ends of top working roll entrance cooling water collector 30 and supplies water to it respectively, 3rd exports branch road is connected with the water inlet that top working roll exports the cavity 302 of the centre of cooling water collector 32 and supplies water to it, 4th output branch road exports the cavity 302 at the two ends of cooling water collector 32 respectively water inlet with top working roll is connected and supplies water to it.
On the single pipeline of the first branch road, confession water source 100 place rises, and sets gradually the first Hand-operated butterfly valve 70, first-class gauge 40, first flow control valve 50, first self-cleaning filter 60, the 7th Hand-operated butterfly valve 76, first Pneumatic butterfly valve 52 and the 9th Hand-operated butterfly valve 78.First output branch road of the first branch road is provided with on the 3rd flow control valve the 80, three output branch road and is provided with the 4th flow control valve 81.
From the first Hand-operated butterfly valve 70 enter water place to first flow control valve 50 water outlet place between pipeline bypass conduit in parallel, this bypass line is arranged the first hand sluice valve 90.First self-cleaning filter 60 enter bypass conduit in parallel between water place and water outlet place, this bypass line is arranged the 3rd Hand-operated butterfly valve 72.From the 7th Hand-operated butterfly valve 76 enter water place to the 9th Hand-operated butterfly valve 78 water outlet place between bypass conduit, this bypass line is arranged the 5th Hand-operated butterfly valve 74.
The pipeline of the second branch road is until stage casing, it is two pipelines by single pipeline flow dividing, these two articles of pipelines are that the 5th output branch road and the 6th exports branch road respectively, 5th exports branch road is connected with the water inlet of bottom working roll entrance cooling water collector 31 and supplies water to it, and the 6th exports branch road is connected with the water inlet that bottom working roll exports cooling water collector 33 and supplies water to it.
On the single pipeline of the second branch road, confession water source 100 place rises, and sets gradually the second Hand-operated butterfly valve 72, second gauge 41, second adjustable valve 51, second self-cleaning filter 61, the 8th Hand-operated butterfly valve 77, second Pneumatic butterfly valve 53 and the tenth Hand-operated butterfly valve 79.
From the second Hand-operated butterfly valve 72 enter water place to second adjustable valve 51 water outlet place between pipeline bypass conduit in parallel, this bypass line is arranged the second hand sluice valve 91.Second self-cleaning filter 61 enter bypass conduit in parallel between water place and water outlet place, this bypass line is arranged the 4th Hand-operated butterfly valve 73.From the 8th Hand-operated butterfly valve 77 enter water place to the tenth Hand-operated butterfly valve 79 water outlet place between bypass conduit, this bypass line is arranged the 6th Hand-operated butterfly valve 75.
Preferably, the length of the cavity 302 of the centre of top working roll entrance cooling water collector 30 is 1m, and the length of the cavity 302 of the centre of top working roll outlet cooling water collector 32 is 1.2m.In theory, cooling water collector equidistantly arranges nozzle 303, then, the spraying width of top working roll entrance cooling water collector 30 is less than the spraying width of top working roll outlet cooling water collector 32.Cavity 302 in the centre of top working roll entrance cooling water collector 30 is not exclusively the same with top working roll outlet cooling water collector 32 length, occurs exception to avoid top working roll 20 interlude and two ends section excessive temperature differentials.Need illustratively, above-mentioned spraying width refers to, ideally, the nozzle 303 at the two ends of each cavity 302 is injected on working roll 2 distance on this working roll axis.
During use, water system operates, the actual flow recorded according to the first-class gauge 40 on its pipeline and second gauge 41 feeds back to the setting current capacity contrast of PLC and operating personnel, and regulates the flow of water system in real time by first flow control valve 50 and the second first flow control valve 50.Top working roll entrance cooling water collector 30 and top working roll export cooling water collector 32 and are set to syllogic, 3rd flow control valve 80, the 4th flow control valve 81, first flow control valve 50 and second adjustable valve 51 coordinate, and regulate in real time according to steel rolling situation to each section of cooling water inflow.By the control to top working roll 20 cooling water total Water separately, and the adjustment to its entrance side collector and the outlet-side header interlude water yield, realize working roll each section of temperature adjustable, according to principle of expanding with heat and contracting with cold, make the temperature of top working roll 20 interlude suitably higher, roller footpath is bigger than normal relative to both sides, thus realizes the control to top working roll 20 convexity.
Secondly, the supply channel of upper working rolls and lower working rolls 21 cooling water is provided with the first self-cleaning filter 60 and the second self-cleaning filter 61, and filtering accuracy is 100um, guarantees the quality of cooling water, avoid occurring that nozzle 303 blocks, thus avoid the accurate problem affecting working roll temperature.
Moreover; cooling water collector supply channel Flow-rate adjustment section and switch valve section are all designed with bypass; when control loop breaks down; by-passing valve can be opened; i.e. the first hand sluice valve 90, second hand sluice valve 91, the 5th Hand-operated butterfly valve 74 and the 6th Hand-operated butterfly valve 75; it guarantees the normal cooling of operation roll of mill, avoids the accident such as equipment downtime or working roll exception.
By the control to top working roll cooling water total Water, and the independence of the water yield of the interlude of the arrival end of heavy and medium plate mill and the top working roll 20 of the port of export is regulated, thus the temperature realizing each section of top working roll 20 is adjustable, according to principle of expanding with heat and contracting with cold, make the temperature of the interlude of top working roll 20 rationally higher, the roller footpath at place is bigger than normal relative to both sides, thus realizes the control to work roll crown, ton steel metal consumption object is effectively controlled, cost declining Be very effective to reach.Below by way of examples prove:
Choose continuous casting billet blank, blank actual size is 150 × 2480 × 4000mm, and finished product thickness is 14mm.Work roll crown is 0.15mm, and backing roll convexity is 0.5mm.
After more renewing working roll, when amount of rolling is within 1000t, first flow control valve 50 and the 3rd flow control valve 80 standard-sized sheet, the 4th flow control valve 81 aperture controls 50%, and second adjustable valve 51 aperture controls, within 50%, to be rolled.When amount of rolling is within the scope of 1000 ~ 2000t, first flow control valve 50 and the 3rd flow control valve 80 aperture control 75%, and the 4th flow control valve 81 aperture controls 50%, and second adjustable valve 51 aperture controls, within 50%, to be rolled.When amount of rolling is at more than 2000t, first flow control valve 50 and the 3rd flow control valve 80 aperture control 50%, and the 4th flow control valve 81 aperture controls 50%, and second adjustable valve 51 aperture controls, within 50%, to be rolled.Thus in the operation of rolling, effectively can control work roll crown, ensure roll gap design load, thus make the steel plate transverse thickness difference produced in critical field.
The present invention is not limited to above-mentioned embodiment, if do not depart from the spirit and scope of the present invention to various change of the present invention or modification, if these are changed and modification belongs within claim of the present invention and equivalent technologies scope, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. a heavy and medium plate mill work roll crown control appliance, is characterized in that: the arrival end of heavy and medium plate mill is provided with top working roll entrance cooling water collector, and the port of export of this heavy and medium plate mill is provided with top working roll outlet cooling water collector; It is three cavitys that this top working roll entrance cooling water collector and top working roll export that cooling water collector is all cut off, each cavity respectively establishes at least one nozzle, and the nozzle of three cavitys of this top working roll entrance cooling water collector is respectively towards two ends and the stage casing of this top working roll, the nozzle of three cavitys of this top working roll outlet cooling water collector is respectively towards two ends and the stage casing of this top working roll; Each cavity respectively establishes at least one water inlet, this water inlet is connected with water system respectively, the branch road be communicated with the middle chamber of this top working roll entrance cooling water collector is provided with the 3rd flow control valve, the 4th flow control valve on the branch road that the middle chamber exporting cooling water collector with this top working roll is communicated with.
2. heavy and medium plate mill work roll crown control appliance as claimed in claim 1, it is characterized in that: the branch road be communicated with the middle chamber of this top working roll entrance cooling water collector and the branch road be communicated with the middle chamber that this top working roll exports cooling water collector cross, and be communicated with watering by a pipeline, this pipeline is provided with first flow control valve.
3. heavy and medium plate mill work roll crown control appliance as claimed in claim 1, is characterized in that: the water place that enters of this first flow control valve is provided with first-class gauge.
4. heavy and medium plate mill work roll crown control appliance as claimed in claim 1, is characterized in that: the spraying width of the middle chamber of this top working roll entrance cooling water collector is not more than the spraying width of the middle chamber of this top working roll outlet cooling water collector.
5. heavy and medium plate mill work roll crown control appliance as claimed in claim 1, it is characterized in that: the arrival end of this heavy and medium plate mill is provided with bottom working roll entrance cooling water collector, the port of export bottom working roll outlet cooling water collector of this heavy and medium plate mill, this bottom working roll entrance cooling water collector and bottom working roll outlet cooling water collector are respectively provided with at least one nozzle, this nozzle is all towards this bottom working roll, this bottom working roll entrance cooling water collector and bottom working roll outlet cooling water collector respectively establish at least one water inlet, this water inlet is crossed by pipeline, and be connected with watering, it flows pipeline altogether and is provided with second adjustable valve.
6. heavy and medium plate mill work roll crown control appliance as claimed in claim 1, is characterized in that: this water system is provided with at least one self-cleaning filter.
7. one kind uses the method for heavy and medium plate mill work roll crown control appliance described in claim 1, it is characterized in that: the cooling water flow of the middle chamber of this top working roll entrance cooling water collector of the 3rd Flux Valve Control is not more than the cooling water flow of its two ends cavity, and the cooling water flow of the middle chamber of the 4th this top working roll of Flux Valve Control outlet cooling water collector is not more than the cooling water flow of its two ends cavity.
8. the method for heavy and medium plate mill work roll crown control appliance as claimed in claim 7, it is characterized in that: the arrival end of this heavy and medium plate mill is provided with bottom working roll entrance cooling water collector, the port of export bottom working roll outlet cooling water collector of this heavy and medium plate mill, this bottom working roll entrance cooling water collector and bottom working roll outlet cooling water collector are respectively provided with at least one nozzle, this nozzle is all towards this bottom working roll, this bottom working roll entrance cooling water collector and bottom working roll outlet cooling water collector respectively establish at least one water inlet, this water inlet is connected with this water system respectively, its connecting pipeline is provided with second adjustable valve, it controls this bottom working roll entrance cooling water collector and bottom working roll outlet cooling water collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410528608.1A CN104307888A (en) | 2014-10-09 | 2014-10-09 | Equipment and method for controlling convexity of heavy and medium plate rolling mill working roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410528608.1A CN104307888A (en) | 2014-10-09 | 2014-10-09 | Equipment and method for controlling convexity of heavy and medium plate rolling mill working roll |
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| CN104307888A true CN104307888A (en) | 2015-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410528608.1A Pending CN104307888A (en) | 2014-10-09 | 2014-10-09 | Equipment and method for controlling convexity of heavy and medium plate rolling mill working roll |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105251774A (en) * | 2015-11-27 | 2016-01-20 | 中冶南方工程技术有限公司 | Roll thermal crown control device |
| CN106735009A (en) * | 2017-01-24 | 2017-05-31 | 深圳市中创镁工程技术有限公司 | Casting Roller, casting system and the casting-rolling technology based on the Casting Roller |
| CN115652139A (en) * | 2022-10-31 | 2023-01-31 | 宁夏中色金航钛业有限公司 | Niobium-titanium alloy precision strip and manufacturing method thereof |
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| CN103978046A (en) * | 2014-05-21 | 2014-08-13 | 北京科技大学 | Hot rolling aluminium plate ejection beam subsection cooling setting method based on multiple parameters |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105251774A (en) * | 2015-11-27 | 2016-01-20 | 中冶南方工程技术有限公司 | Roll thermal crown control device |
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| CN106735009A (en) * | 2017-01-24 | 2017-05-31 | 深圳市中创镁工程技术有限公司 | Casting Roller, casting system and the casting-rolling technology based on the Casting Roller |
| CN106735009B (en) * | 2017-01-24 | 2020-05-19 | 湖南金镁科新材料有限公司 | Casting roller, casting and rolling system and casting and rolling process based on casting roller |
| CN115652139A (en) * | 2022-10-31 | 2023-01-31 | 宁夏中色金航钛业有限公司 | Niobium-titanium alloy precision strip and manufacturing method thereof |
| CN115652139B (en) * | 2022-10-31 | 2023-11-24 | 宁夏中色金航钛业有限公司 | Niobium-titanium alloy precise strip and manufacturing method thereof |
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Application publication date: 20150128 |
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