CN108857872A - A kind of magnetically soft alloy strip surface cleaning method and its device - Google Patents
A kind of magnetically soft alloy strip surface cleaning method and its device Download PDFInfo
- Publication number
- CN108857872A CN108857872A CN201810446719.6A CN201810446719A CN108857872A CN 108857872 A CN108857872 A CN 108857872A CN 201810446719 A CN201810446719 A CN 201810446719A CN 108857872 A CN108857872 A CN 108857872A
- Authority
- CN
- China
- Prior art keywords
- magnetically soft
- soft alloy
- guide reel
- alloy strip
- strip surface
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/005—Feeding or manipulating devices specially adapted to grinding machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
- B24B27/033—Other grinding machines or devices for grinding a surface for cleaning purposes, e.g. for descaling or for grinding off flaws in the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/20—Drives or gearings; Equipment therefor relating to feed movement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/10—Single-purpose machines or devices
- B24B7/12—Single-purpose machines or devices for grinding travelling elongated stock, e.g. strip-shaped work
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
- C23G3/023—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously by spraying
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
- C23G3/027—Associated apparatus, e.g. for pretreating or after-treating
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The present invention provides a kind of magnetically soft alloy strip surface cleaning method and its device, belong to non-retentive alloy field of material surface treatment, this method conveys magnetically soft alloy band including the use of a transmission mechanism and is tensioned by tensioning apparatus, magnetically soft alloy strip surface is sprayed simultaneously, the softening of magnetically soft alloy strip surface impurity is accelerated to decompose and clean to the greasy dirt and grease on magnetically soft alloy surface, magnetically soft alloy band after finally polishing is packaged, it is easy to operate, instead of manual operation, grinding efficiency improves 5 times or so.
Description
Technical field
The present invention relates to non-retentive alloy field of material surface treatment, in particular to a kind of magnetically soft alloy strip surface cleaning
Method and device thereof.
Background technique
Magnetically soft alloy band is widely used in making current transformer since it is with high magnetic permeability, low coercivity
The use of the devices such as iron core, magnetic head, magnetic screen in industries such as military project, space flight, electric, precision instrument and instrument, often through
Rolling obtains, and whether through hot rolling or cold bundle, magnetically soft alloy strip surface is inevitably with aerobic in the fabrication process
Change the impurity such as layer, machine oil, lithium saponify, needs first to be removed again to oxide layer progress manual polishing, inefficiency grease.
Summary of the invention
The object of the invention：In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of magnetically soft alloy band table
Face cleaning method and its device are realized at the automatical and efficient assembly line that magnetically soft alloy strip surface impurity removes and cleans
Reason.
Technical solution：In order to reach foregoing invention, the present invention is specifically achieved like this：
A kind of magnetically soft alloy strip surface cleaning method, which is characterized in that
（1）Using a transmission mechanism convey magnetically soft alloy band and by tensioning apparatus be tensioned, tensile force control 9.8 newton with
On, feed speed scope control is in 0-5 meter per second；
（2）The clamping force control of magnetically soft alloy band abutting grinding device, magnetically soft alloy strip surface and grinding device is at 9.8 Ns
Or more；
（3）The rotational velocity range for controlling grinding device is 60-300r/min；
（4）The solution misty to the injection of magnetically soft alloy strip surface, pressure control is in 0.5-0.8MPa, the solution containing clear
Lotion, solution temperature are 10-50 DEG C, and solution contains following component by percentage to the quality：Water 70-80%, cleaning agent 20%-30%；
（5）The magnetically soft alloy strip coil after polishing is tied by conveying device and is packaged.
Tensioning apparatus conveys magnetically soft alloy band, and grinding device is contacted with magnetically soft alloy surface, passes through motor band
Movable strap disc, belt pulley drive grinding device, and the misty solution of injection removes grease in time while polishing, improve work
Efficiency realizes automation continuous productive process.
Further, the cleaning agent contains following component by percentage to the quality：Hydrochloric acid 5-10%, hydrofluoric acid 2-5%,
Activating agent 10-20%, water 65-83%.Hydrochloric acid and hydrofluoric acid can effectively be chemically reacted with oxide layer, and accelerated oxidation layer takes off
It falls.
Further, the activating agent contains following component according to parts by weight：2-8 parts of alkyl phenol polyoxyethylene ether, three second
30-50 parts of hydramine 2-5, water.Alkyl phenol polyoxyethylene ether is effective metal cleaner, and triethanolamine is the important system of corrosion inhibiter
Standby component, protects metal surface, prevents from aoxidizing.
A kind of device of magnetically soft alloy strip surface cleaning method, it is right including left guide reel, the cabinet on the left of cabinet, cabinet
The right guide reel of side, which is characterized in that the box house is equipped with grinding device, is equipped with middle guide reel below grinding device, beats
Mill apparatus two sides are equipped with injection spray pipe, and the bottom of box is equipped with groove.Grinding device high speed is revolved by motor band movable strap disc
Turn, magnetically soft alloy band is conveyed by tension conveying device and passes through cabinet, plane locating for magnetically soft alloy band is slightly above polished
The lowest point of device makes grinding device touch magnetically soft alloy band, forms the streamlined operation being packaged in polishing, middle guide reel
The two sides for connecting cabinet, increase the intensity of cabinet, while passing through cabinet to magnetically soft alloy band and playing certain guidance
Effect, injection spray pipe spray the solution of atomization, clear up magnetically soft alloy strip surface, and the solution that groove is by convection into cabinet carries out
It collects, flows to designated position.
Further, the grinding device is rotary shaft, blinds bistrique, the rotary shaft side respectively from internal layer to outer layer
Affixed belt pulley, belt pulley connect motor, and the rotary shaft other side is nut, and nut and rotary shaft are threadedly coupled, the blinds mill
Head is hollow cylindrical, and blinds bistrique is 80-400 mesh.Belt pulley connects the rotation that can reach fair speed, and blinds bistrique can root
It is selected according to the specific material of magnetically soft alloy band, by rotating nuts, nut is made to compress blinds bistrique.
Further, the left guide reel includes upper left guide reel, lower-left guide reel；The right guide reel includes that upper right is drawn
Deflector roll, bottom right guide reel；Lower-left guide reel side is equipped with left sprocket wheel；Bottom right guide reel side is equipped with right sprocket wheel；Institute
It states and is connected between left sprocket wheel and right sprocket wheel by chain.Lower-left guide reel or bottom right guide reel can connect motor, pass through chain
Wheel and chain-driving lower-left guide reel and bottom right guide reel roll together.Magnetically soft alloy band initially by upper right guide reel and
Bottom right guide reel, the grip force between upper left guidance rolling and lower-left guide reel slowly moves, to make one of magnetically soft alloy band
From cabinet is slowly passed through, the other side of described device is reached.
Further, the upper left guide reel is equipped with left adjusting screw rod；The upper right guide reel is equipped with right adjusting screw rod.It adjusts
Section roller spacing compresses the magnetically soft alloy band of different-thickness, then guide one of magnetically soft alloy band from described device
Right side be directed to the left side of described device.
Further, it is equipped with left injection spray pipe on the left of the grinding device, is equipped with right injection spray pipe on the right side of grinding device.To polishing
The conscientious misty injection in device two sides, degreases and grease, also removes the impurity such as removing oxide layer to a certain extent.
Beneficial effect：The present invention has the following advantages that compared with traditional sight technology：
1. the magnetically soft alloy band for adapting to overlength various specifications carries out the streamlined operation of surface clean, efficiency is improved, is taken
For handwork.
2. can oxide layer and greasy dirt and grease efficiently be removed and be cleaned.
3. being suitble to the magnetically soft alloy band of coiled, various width ranges.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of a kind of magnetically soft alloy strip surface cleaning method and its device.
Fig. 2 is the left view of a kind of magnetically soft alloy strip surface cleaning method and its device.
Fig. 3 is the schematic diagram that a kind of magnetically soft alloy strip surface cleaning method and its device combine.
Specific embodiment
Below in conjunction with attached drawing and example, the present invention will be further described.
Embodiment 1：
Such as the removal device of Fig. 1, a kind of magnetically soft alloy strip surface cleaning method as shown in Figure 2 and its device, including cabinet
1, the right guide reel 6 on 1 right side of left guide reel 7, cabinet in the left side of cabinet 1 is equipped with grinding device 4, polishing dress inside the cabinet 1
It sets 4 lower sections and is equipped with middle guide reel 9,4 two sides of grinding device are equipped with injection spray pipe, and 1 bottom of cabinet is equipped with groove 11.The grinding device
4 be rotary shaft 4.3, blinds bistrique 4.1 respectively from internal layer to outer layer, the affixed belt pulley 10 in 4.3 side of rotary shaft, belt pulley
10 connection motors, 4.3 other side of rotary shaft are nut 4.2, and nut 4.2 and rotary shaft 4.3 are threadedly coupled, the blinds bistrique
4.1 be hollow cylindrical, and blinds bistrique 4.1 is 80-200 mesh.The left guide reel 7 includes upper left guide reel 7.2, lower-left guidance
Roller 7.3；The right guide reel 6 includes upper right guide reel 6.2, bottom right guide reel 6.3；7.3 side of lower-left guide reel is equipped with
Left sprocket wheel 7.4；6.3 side of bottom right guide reel is equipped with right sprocket wheel 6.4；Pass through between the left sprocket wheel 7.4 and right sprocket wheel 6.4
Chain connection 3.The upper left guide reel 7.2 is equipped with left adjusting screw rod 7.1；The upper right guide reel 6.2 is equipped with right adjusting screw rod
6.1.It is equipped with left injection spray pipe 2 on the left of grinding device 4, is equipped with right injection spray pipe 5 on the right side of grinding device 4.
Magnetically soft alloy band 8 enters from right side, by upper right guide reel 6.2 and bottom right guide reel 6.3, right adjusting screw rod
6.1 adjustings compress magnetically soft alloy band 8, are slowly rotated by rotation bottom right guide reel 6.3, make magnetically soft alloy band 8 from the right side
It turns left and enters upper left guide reel 7.2 and lower-left guide reel 7.3, by the conveying of roller until 8 one arrival of magnetically soft alloy band refer to
Positioning is set, and unclamps left adjusting spiral 7.1 and right adjusting spiral 6.1, upper left guide reel 7.2 and upper right guide reel 6.2 move up,
Magnetically soft alloy band 8 leaves roll surface, starts motor at this time, and motor band movable strap disc 10 makes 4 high speed rotation of grinding device, contacts
8 surface of magnetically soft alloy band starts to carry out the polishing operation of oxide layer, the mist that left injection spray pipe 2 and right injection spray pipe 5 spray
Solution, cloudy solution at normal temperature solution inner additive activity preferably, play the role of remove machine oil, lithium saponify, simultaneously
Acidic chemical object can be chemically reacted with oxide layer, the softening of accelerated oxidation layer and be fallen off, and last magnetically soft alloy band 8 is from a left side
It is transported out between upper guide reel 7.2 and lower-left guide reel 7.3, carries out packing process, solution leads in cabinet in the process
It crosses groove 11 and is collected into designated position.
Embodiment 2：
It on the basis of embodiment 1, can be to magnetically soft alloy band 8 by 9 location swap of grinding device 4 and middle guide reel
Lower surface is cleaned, and magnetically soft alloy band 8 first passes through device of the grinding device 4 on middle guide reel 9, then by polishing dress
4 are set under, middle guide reel 9 can disposably realize the purpose of two-sided cleaning in upper device to magnetically soft alloy band 8.
Claims (8)
1. a kind of magnetically soft alloy strip surface cleaning method, which is characterized in that
（1）Using a transmission mechanism convey magnetically soft alloy band and by tensioning apparatus be tensioned, tensile force control 9.8 newton with
On, feed speed scope control is in 0-5 meter per second；
（2）The clamping force control of magnetically soft alloy band abutting grinding device, magnetically soft alloy strip surface and grinding device is at 9.8 Ns
Or more；
（3）The rotational velocity range for controlling grinding device is 60-300r/min；
（4）The solution misty to the injection of magnetically soft alloy strip surface, pressure control is in 0.5-0.8MPa, the solution containing clear
Lotion, solution temperature are 20-40 DEG C, and solution contains following component by percentage to the quality：Water 70-80%, cleaning agent 20%-30%；
（5）The magnetically soft alloy strip coil after polishing is tied by conveying device and is packaged.
2. a kind of magnetically soft alloy strip surface cleaning method according to claim 1, which is characterized in that the cleaning agent with
Mass percent meter contains following component：Hydrochloric acid 5-10%, hydrofluoric acid 2-5%, activating agent 10-20%, water 65-83%.
3. a kind of magnetically soft alloy strip surface cleaning method according to claim 2, which is characterized in that the activating agent is pressed
Parts by weight meter contains following component：2-8 parts of alkyl phenol polyoxyethylene ether, triethanolamine 2-5,30-50 parts of water.
4. a kind of device of the magnetically soft alloy strip surface cleaning method as described in one of claim 1 ~ 3, including cabinet, cabinet
Right guide reel on the right side of the left guide reel in left side, cabinet, which is characterized in that the box house is equipped with grinding device, polishing dress
It sets lower section and is equipped with middle guide reel, grinding device two sides are equipped with injection spray pipe, and the bottom of box is equipped with groove.
5. a kind of device of magnetically soft alloy strip surface cleaning method according to claim 4, which is characterized in that described to beat
Mill apparatus is rotary shaft, blinds bistrique respectively from internal layer to outer layer, the affixed belt pulley in the rotary shaft side, belt pulley connection electricity
Machine, the rotary shaft other side are nut, and nut and rotary shaft are threadedly coupled, and the blinds bistrique is hollow cylindrical, blinds bistrique
For 100-300 mesh.
6. a kind of device of magnetically soft alloy strip surface cleaning method according to claim 4, which is characterized in that the left side
Guide reel includes upper left guide reel, lower-left guide reel；The right guide reel includes upper right guide reel, bottom right guide reel；The left side
Lower guide reel side is equipped with left sprocket wheel；Bottom right guide reel side is equipped with right sprocket wheel；Lead between the left sprocket wheel and right sprocket wheel
Cross chain connection.
7. a kind of device of magnetically soft alloy strip surface cleaning method according to claim 6, which is characterized in that the left side
Upper guide reel is equipped with left adjusting screw rod；The upper right guide reel is equipped with right adjusting screw rod.
8. a kind of device of magnetically soft alloy strip surface cleaning method according to claim 4, which is characterized in that described to beat
It is equipped with left injection spray pipe on the left of mill apparatus, is equipped with right injection spray pipe on the right side of grinding device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810446719.6A CN108857872A (en) | 2018-05-11 | 2018-05-11 | A kind of magnetically soft alloy strip surface cleaning method and its device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810446719.6A CN108857872A (en) | 2018-05-11 | 2018-05-11 | A kind of magnetically soft alloy strip surface cleaning method and its device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108857872A true CN108857872A (en) | 2018-11-23 |
Family
ID=64333553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810446719.6A Withdrawn CN108857872A (en) | 2018-05-11 | 2018-05-11 | A kind of magnetically soft alloy strip surface cleaning method and its device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108857872A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0825202A (en) * | 1994-07-21 | 1996-01-30 | Nkk Corp | Continuous grinding line |
| JP2000317833A (en) * | 1999-05-06 | 2000-11-21 | Nippon Steel Corp | Dressing method for polishing belt |
| CN2661408Y (en) * | 2003-11-27 | 2004-12-08 | 黄和川 | Milling machine for stone slab |
| CN102400162A (en) * | 2011-11-28 | 2012-04-04 | 常州市凯纳环保科技有限公司 | Cleaning agent for stainless steel cold-rolling piece and preparation method thereof |
| CN202479236U (en) * | 2012-03-07 | 2012-10-10 | 湖州金冶电子材料股份有限公司 | Device for removing scale of steel belt |
| CN203185095U (en) * | 2013-04-02 | 2013-09-11 | 浙江富日进材料科技有限公司 | Coil stock strip polishing assembly line |
| CN103737464A (en) * | 2013-12-13 | 2014-04-23 | 宋芬 | Hairbrush grinding machine |
| CN203973316U (en) * | 2014-06-12 | 2014-12-03 | 宁波宇能复合铜带有限公司 | A kind of steel band grinding process device with support |
| CN107030596A (en) * | 2017-05-31 | 2017-08-11 | 嘉善宝狐服饰有限公司 | A kind of polishing machine |
| CN207204908U (en) * | 2017-08-23 | 2018-04-10 | 阜阳市棋剑节能环保设备有限公司 | A kind of steel pipe straightening derusting painting machine |
| CN107971917A (en) * | 2017-11-29 | 2018-05-01 | 北京鼎臣世纪超导科技有限公司 | A kind of band polissoir |
| CN207309582U (en) * | 2017-09-25 | 2018-05-04 | 江西鑫力华数码科技有限公司 | A kind of flexible copper clad wiring board scrubber |
-
2018
- 2018-05-11 CN CN201810446719.6A patent/CN108857872A/en not_active Withdrawn
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0825202A (en) * | 1994-07-21 | 1996-01-30 | Nkk Corp | Continuous grinding line |
| JP2000317833A (en) * | 1999-05-06 | 2000-11-21 | Nippon Steel Corp | Dressing method for polishing belt |
| CN2661408Y (en) * | 2003-11-27 | 2004-12-08 | 黄和川 | Milling machine for stone slab |
| CN102400162A (en) * | 2011-11-28 | 2012-04-04 | 常州市凯纳环保科技有限公司 | Cleaning agent for stainless steel cold-rolling piece and preparation method thereof |
| CN202479236U (en) * | 2012-03-07 | 2012-10-10 | 湖州金冶电子材料股份有限公司 | Device for removing scale of steel belt |
| CN203185095U (en) * | 2013-04-02 | 2013-09-11 | 浙江富日进材料科技有限公司 | Coil stock strip polishing assembly line |
| CN103737464A (en) * | 2013-12-13 | 2014-04-23 | 宋芬 | Hairbrush grinding machine |
| CN203973316U (en) * | 2014-06-12 | 2014-12-03 | 宁波宇能复合铜带有限公司 | A kind of steel band grinding process device with support |
| CN107030596A (en) * | 2017-05-31 | 2017-08-11 | 嘉善宝狐服饰有限公司 | A kind of polishing machine |
| CN207204908U (en) * | 2017-08-23 | 2018-04-10 | 阜阳市棋剑节能环保设备有限公司 | A kind of steel pipe straightening derusting painting machine |
| CN207309582U (en) * | 2017-09-25 | 2018-05-04 | 江西鑫力华数码科技有限公司 | A kind of flexible copper clad wiring board scrubber |
| CN107971917A (en) * | 2017-11-29 | 2018-05-01 | 北京鼎臣世纪超导科技有限公司 | A kind of band polissoir |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181123 |
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| WW01 | Invention patent application withdrawn after publication |