WO2017083192A1 - Temperature management for a cryogenically cooled boring tool - Google Patents
Temperature management for a cryogenically cooled boring tool Download PDFInfo
- Publication number
- WO2017083192A1 WO2017083192A1 PCT/US2016/060534 US2016060534W WO2017083192A1 WO 2017083192 A1 WO2017083192 A1 WO 2017083192A1 US 2016060534 W US2016060534 W US 2016060534W WO 2017083192 A1 WO2017083192 A1 WO 2017083192A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coolant
- cartridge
- exhaust
- path
- tool
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/10—Cutting tools with special provision for cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/06—Drills with lubricating or cooling equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
- B23Q11/1015—Arrangements for cooling or lubricating tools or work by supplying a cutting liquid through the spindle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
- B23Q11/1015—Arrangements for cooling or lubricating tools or work by supplying a cutting liquid through the spindle
- B23Q11/1023—Tool holders, or tools in general specially adapted for receiving the cutting liquid from the spindle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
- B23Q11/1038—Arrangements for cooling or lubricating tools or work using cutting liquids with special characteristics, e.g. flow rate, quality
- B23Q11/1053—Arrangements for cooling or lubricating tools or work using cutting liquids with special characteristics, e.g. flow rate, quality using the cutting liquid at specially selected temperatures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2226/00—Materials of tools or workpieces not comprising a metal
- B23B2226/66—Polytetrafluoroethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2250/00—Compensating adverse effects during turning, boring or drilling
- B23B2250/12—Cooling and lubrication
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
- B23B41/12—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor for forming working surfaces of cylinders, of bearings, e.g. in heads of driving rods, or of other engine parts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/44—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product
- Y10T408/45—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product including Tool with duct
Definitions
- the device relates to temperature management for a cryogenically cooled boring tool to reduce thermal related bore geometry distortion of a workpiece.
- cryogenic coolant to reduce cutting edge wear has proven to be advantageous in milling, turning and other metal cutting processes. It has been found that using a cryogenically cooled cutting tool in a boring operation such as cylinder boring can result in deformation of the bore caused by cryogenic coolant from the tool coming into contact with the cylinder walls caused by coolant that is exhausted from the tool to atmosphere, and leakage of cryogenic coolant from the coolant flow path within the tool. With regard to leakage in the coolant flow path within the tool body, it is difficult to seal the interface between the cutter body and the adjustable cartridge which holds the cutting insert.
- Figure 1 is a perspective end view of the boring tool.
- Figure 2 is a side view of the boring tool of Figure 1 in a cylindrical bore of a workpiece.
- Figure 3 is a perspective view of a cartridge which holds a cutting tool insert.
- Figure 4 is a perspective view of the bottom face of a cutting tool insert.
- Figure 5 is a perspective view of the top face of an insert.
- Figure 6 is a detail perspective view partially in section of the front portion of a boring tool.
- Figure 7 is a side sectional view of the front portion of a boring tool.
- Figure 8 is a detail view of the section 8 designated in Figure 7.
- Figure 9 is a detail view of the connecting tube shown in Figure 8.
- FIG. 1 is a perspective end view of the front end of a boring tool generally designated by the reference numeral 10.
- the boring tool 10 may have a tool body 11 with a generally cylindrical outer surface 12, a shank end 13 for coupling the tool to a rotary drive, and a front end 14 which engages a workpiece.
- the front end 14 may support a plurality of cutting tool inserts 16.
- the boring tool 10 may have a coolant flow path 15 within the tool that includes a coolant supply path 17 in the tool body extending from the shank end 13 to the front end 14 of the boring tool 10 for conducting coolant to the cutting tool inserts 16, and a plurality of internal exhaust paths 18 for conducting coolant from inserts 16 back to the shank end 13.
- the coolant flow path 15 also includes radial feed paths 52 in the tool body, and a cartridge feed paths 55 in cartridges 30 in which the cutting tool inserts 16 are mounted as described more fully below.
- the coolant supply path 17 may be positioned along the rotary axis 20 of the tool, and the internal exhaust paths 18 may be positioned between the supply path 17 and outer surface 12 of the tool.
- the internal exhaust paths 18 may be spaced from the outer surface 12 of the tool body 11 to reduce the cooling effect of the coolant on the outer surface 12 of the tool body 1 1.
- the coolant that is used may be a cryogenic coolant such as liquid nitrogen (LN2), or any other cryogenic coolant used in industrial machining operations.
- LN2 liquid nitrogen
- Both the coolant supply path 17 and the internal exhaust paths 18 may be lined with a cryogenically compatible thermally insulating material 21 such as plastic.
- a cryogenically compatible thermally insulating material 21 such as plastic.
- tubes or linings of polytetraflourethylene (PTFE) were used, but other materials may be used.
- the boring tool 10 may have a plurality of cutting tool inserts 16 spaced around the outer circumference of the front end 14 of the tool.
- Each of the inserts 16 may have an active cutting edge 39 which engages a workpiece during a cutting operation. In the embodiment shown, there are five cutting tool inserts 16, but more or fewer cutting tool inserts 16 may be provided as desired.
- Figure 2 is a side view of the boring tool of Figure 1 in a cylindrical bore such as in the cylinder bore 24 of workpiece 23 such as an internal combustion engine.
- Each internal exhaust path 18 is coupled to an exhaust port 26 formed on the outer surface 12 of the cutting tool body 11.
- the exhaust ports 26 are positioned on the cutting tool body 1 1 remote from the cutting tool inserts 16 so that the ports 26 are outside of the cylindrical bore 24 when the active cutting edges 39 of the cutting tool inserts 16 on the front of the tool body 11 have passed through the cylinder bore 24 and are outside of out of the cylindrical bore 24 as shown.
- the boring tool 10 is designed so that the axial distance 27 between the exhaust ports 26 and the active cutting edges of the cutting tool inserts 16 is greater than the depth 28 of the bore 24 in which the tool 10 will be used.
- FIG 3 is a detail view of a cartridge 30 which holds a cutting tool insert 16.
- the cartridge 30 may have one or more mounting holes 31 which may receive a cartridge mounting bolt, not shown, for mounting the cartridge 30 in the front end 14 of a tool, and a radial adjusting screw 35 which flexes the cartridge 30 to adjust the cutting diameter of the tool 10 by adjusting the position of the active cutting edge 39 of the cutting tool insert 16.
- the cartridge 30 may be formed with a pocket 32 which receives the cutting tool insert 16.
- the cutting tool insert 16 may be held against the back wall 33 of the pocket 32 by an insert mounting bolt 34.
- the insert mounting bolt 34 may pass through an insert mounting bolt hole 36 that may extend between the top face 37 of the insert and the bottom face 38 of the insert 16.
- Figure 4 is a perspective view of the bottom face 38 of the cutting tool insert 16.
- the bottom face 38 may have a raised outer rim 41 which extends around the outer periphery of the insert 16, and a raised inner rim 42 which surrounds the insert mounting bolt hole 36.
- the raised outer rim 41 and the raised inner rim 42 lie in a common plane.
- a channel 43 may be formed between the raised outer rim 41 and the raised inner rim 42 of the insert 16.
- FIG. 5 is a perspective view of the top face 37 of the cutting tool insert 16 of Figure 4.
- Figure 6 is a front perspective view of a boring tool 10 partially in section showing the upper half of the front end 14 of the tool
- Figure 7 is a side sectional view of the upper half of the front end 14 of the tool.
- a cartridge 30 is mounted on a seating surface 51 on the front end 14 of the tool body 11, and a cutting tool insert 16 is mounted in the cartridge 30.
- the coolant flow path 15 includes the axial coolant supply path 17 and the radial feed path 52 in the tool body, and a cartridge feed path 55 in the cartridge 30.
- the radial feed path 52 in the tool body 11 terminates at the seating surface 51.
- a feed transfer tube 54 may be inserted in the upper portion of the radial feed path 52 and may join the radial feed path 52 with a cartridge feed path 55 formed in the cartridge 30.
- the cartridge feed path 55 may deliver coolant to the coolant cavity 45 in the insert 16 as described more fully below.
- the feed transfer tube 54 may have a portion 62 that extends into the cartridge 30 and may have a threaded portion 60 that is threaded into the tool body 11.
- a cartridge exhaust path 49 is formed in the cartridge 30 and may extend from the pocket 32 to the bottom surface 57 of the cartridge 30.
- An exhaust transfer tube 58 joins the cartridge exhaust path 49 with a radial exhaust path 59 that extends from the seating surface 51 formed in the tool body 11 to the internal exhaust path 18 formed in the tool body 11.
- the internal exhaust path 18 may extend in an axial direction along the boring tool 10 toward the shank end 13 of the tool and may communicate with one of the exhaust ports 26 as shown in Figures 1 and 2.
- the internal exhaust paths 18 may be lined with a cryogenic compatible insulator to minimize the heat transfer between the coolant in the internal exhaust path 18 and the tool body 11.
- the exhaust ports 26 may be positioned on the outer surface 12 of the tool body so that they remain outside of the cylindrical bore 24 of a workpiece 23 when the tool body 1 1 is fully inserted into the bore 24 as shown in Figure 2.
- the feed transfer tube 54 may have a threaded portion 60 and may be screwed into the tool body 1 1.
- the feed transfer tube 54 may have a nipple on either end.
- a first nipple 61 may be press fit into a first insulating tube 66 which lines the radial feed path 52, and a second nipple 62 may be press fit into a second insulating tube 67 which may line the cartridge feed path 55.
- the feed transfer tube 54 may be formed of metal, and in the preferred embodiment, stainless steel was used. Other materials or metals may be used.
- the first and second insulating tubes 66 and 67, respectively, may comprise cryogenically compatible thermally insulating material such as plastic or nylon. In the preferred embodiment, PTFE tubes were used. Other materials may be used.
- the exhaust transfer tube 58 may communicate on a first end with the radial exhaust path 59 in the tool body 11 , and on a second end with a cartridge exhaust path 49 formed in the cartridge 30.
- the exhaust transfer tube may be formed of metal and similar in construction to the feed transfer tube 54, but may be sized differently to accommodate the flow requirements of the exhaust flow.
- the exhaust transfer tube 58 may be threaded and may be screwed into the tool body 11.
- the exhaust transfer tube 58 may have a nipple on either end.
- a first nipple 63 may be press fit into a third insulating tube 68 which lines the radial exhaust path 59, and a second nipple 64 may be press fit into a fourth insulating tube 69 which lines the cartridge exhaust path 49.
- the third and fourth insulating tubes 68 and 69 may comprise cryogenically compatible thermally insulating material such as plastic or nylon. In the preferred embodiment, PTFE tubes were used. Other materials may be used.
- the coolant feed path may extend from the coolant supply path 17 to the coolant cavity 45 formed by the cutting tool insert 16, and may include the radial feed path 52 and the cartridge feed path 55 that extends from the end of the feed transfer tube 54 through the cartridge 30 to a feed outlet 70 in the back wall 33 of the cartridge pocket 32.
- the feed outlet 70 is aligned with the coolant cavity 45 that is formed between the raised outer rim 41 and the raised inner rim 42 on the bottom face 38 of the insert 16.
- cryogenic coolant may be supplied from an external supply to the coolant supply path 17 in the tool body 11.
- the cryogen may enter the radial feed line 52 and the feed transfer tube 54 mounted in the tool body 1 1.
- the cryogen may enter the cartridge feed path 55.
- the coolant from the cartridge feed path 55 may enter the coolant cavity 45 on the bottom face 38 of the insert 16, cooling the insert 16 and especially the cutting edge 39 of the insert that is in contact with the workpiece 23.
- the exhaust produced by the boiling-off of cryogen coolant in the coolant cavity 45 may be directed through the cartridge exhaust path 49 to the exhaust transfer tube 58 in the cutting tool body 11 , to the exhaust path 18, and to the exhaust ports 26 which exhaust the coolant to atmosphere.
- the exhaust ports 26 as shown in Figure 2 are outside of the workpiece bore 24 to maintain an atmospheric air barrier between the cryogenic exhaust flow from the ports and the workpiece 23.
- the flow of cryogenic coolant through the flow path in the tool body 11 cools the components that form the flow path, including the insulating tubes 66-69 that are mated to either end of the transfer tubes 54 and 58.
- the insulating tubes 66-69 shrink, it tightens the seal between the first and second insulating tubes 66 and 67 and the feed transfer tube 54, and between the third and fourth insulating tubes 68 and 69 and the exhaust transfer tube 58, because the shrinkage of the insulating tubes 66-69 is greater than the shrinkage of the metal transfer tubes 54 and 58.
- the shrinking of the insulating tubes 66-69 on the transfer tubes 54 and 58 creates a leak proof seal due to the shrink rate differences of the mating parts.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Drilling And Boring (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Auxiliary Devices For Machine Tools (AREA)
Abstract
Description
Claims
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020187012737A KR20180068333A (en) | 2015-11-12 | 2016-11-04 | Temperature management for cryogenic cooling boring tools |
BR112018009560A BR112018009560A2 (en) | 2015-11-12 | 2016-11-04 | cryogenically cooled drilling tool for temperature management |
CN201680066321.9A CN108290222B (en) | 2015-11-12 | 2016-11-04 | Boring cutter for sub-cooled |
CA3005032A CA3005032A1 (en) | 2015-11-12 | 2016-11-04 | Temperature management for a cryogenically cooled boring tool |
MX2018005988A MX2018005988A (en) | 2015-11-12 | 2016-11-04 | Temperature management for a cryogenically cooled boring tool. |
JP2018523463A JP6797913B2 (en) | 2015-11-12 | 2016-11-04 | Temperature control of boring tools that are cooled to extremely low temperatures |
RU2018120852A RU2018120852A (en) | 2015-11-12 | 2016-11-04 | CRYOGEN COOLED DRILLING TOOL TEMPERATURE CONTROL |
EP16864803.8A EP3374110A4 (en) | 2015-11-12 | 2016-11-04 | Temperature management for a cryogenically cooled boring tool |
US15/775,419 US10413977B2 (en) | 2015-11-12 | 2016-11-04 | Temperature management for a cryogenically cooled boring tool |
IL259018A IL259018A (en) | 2015-11-12 | 2018-04-29 | Temperature management for a cryogenically cooled boring tool |
ZA2018/03775A ZA201803775B (en) | 2015-11-12 | 2018-06-07 | Temperature management for a cryogenically cooled boring tool |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201562254407P | 2015-11-12 | 2015-11-12 | |
US62/254,407 | 2015-11-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017083192A1 true WO2017083192A1 (en) | 2017-05-18 |
Family
ID=58695079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2016/060534 WO2017083192A1 (en) | 2015-11-12 | 2016-11-04 | Temperature management for a cryogenically cooled boring tool |
Country Status (12)
Country | Link |
---|---|
US (1) | US10413977B2 (en) |
EP (1) | EP3374110A4 (en) |
JP (1) | JP6797913B2 (en) |
KR (1) | KR20180068333A (en) |
CN (1) | CN108290222B (en) |
BR (1) | BR112018009560A2 (en) |
CA (1) | CA3005032A1 (en) |
IL (1) | IL259018A (en) |
MX (1) | MX2018005988A (en) |
RU (1) | RU2018120852A (en) |
WO (1) | WO2017083192A1 (en) |
ZA (1) | ZA201803775B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101997083B1 (en) * | 2018-01-16 | 2019-07-05 | 한국정밀기계(주) | Spindle assembly for extream low temperature |
WO2023158546A1 (en) * | 2022-02-17 | 2023-08-24 | Kennametal Inc. | Rotary cutting tool with support structure |
US11883894B2 (en) | 2021-07-13 | 2024-01-30 | Kennametal Inc. | Composite cutting tool |
US11911835B2 (en) | 2022-03-23 | 2024-02-27 | Kennametal Inc. | Lightweight rotary cutting tool |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102136977B1 (en) | 2019-02-18 | 2020-07-23 | 한국정밀기계(주) | Tooling kit with cryogenic injection |
KR20230028893A (en) | 2021-08-23 | 2023-03-03 | 한국생산기술연구원 | Holder assembly for cutting tool and including processing device thereof |
KR102620887B1 (en) | 2021-08-23 | 2024-01-05 | 한국생산기술연구원 | Indirect injection and mql injection type insert cutting tool and including processing device thereof |
KR20240072446A (en) | 2022-11-16 | 2024-05-24 | 한국생산기술연구원 | Tooling kit device for liquid nitrogen cooling with improved durability |
CN117300225B (en) * | 2023-11-29 | 2024-03-15 | 厦门金鹭特种合金有限公司 | Internally cooled cutter bar and cutter |
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- 2016-11-04 MX MX2018005988A patent/MX2018005988A/en unknown
- 2016-11-04 JP JP2018523463A patent/JP6797913B2/en active Active
- 2016-11-04 US US15/775,419 patent/US10413977B2/en not_active Expired - Fee Related
- 2016-11-04 EP EP16864803.8A patent/EP3374110A4/en not_active Withdrawn
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- 2016-11-04 WO PCT/US2016/060534 patent/WO2017083192A1/en active Application Filing
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- 2016-11-04 RU RU2018120852A patent/RU2018120852A/en not_active Application Discontinuation
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Title |
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See also references of EP3374110A4 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101997083B1 (en) * | 2018-01-16 | 2019-07-05 | 한국정밀기계(주) | Spindle assembly for extream low temperature |
US11883894B2 (en) | 2021-07-13 | 2024-01-30 | Kennametal Inc. | Composite cutting tool |
WO2023158546A1 (en) * | 2022-02-17 | 2023-08-24 | Kennametal Inc. | Rotary cutting tool with support structure |
US11911835B2 (en) | 2022-03-23 | 2024-02-27 | Kennametal Inc. | Lightweight rotary cutting tool |
Also Published As
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JP6797913B2 (en) | 2020-12-09 |
MX2018005988A (en) | 2018-08-29 |
RU2018120852A3 (en) | 2020-02-13 |
RU2018120852A (en) | 2019-12-17 |
US10413977B2 (en) | 2019-09-17 |
JP2019501028A (en) | 2019-01-17 |
KR20180068333A (en) | 2018-06-21 |
EP3374110A4 (en) | 2018-12-05 |
US20180345387A1 (en) | 2018-12-06 |
CA3005032A1 (en) | 2017-05-18 |
ZA201803775B (en) | 2019-03-27 |
EP3374110A1 (en) | 2018-09-19 |
CN108290222B (en) | 2019-11-29 |
CN108290222A (en) | 2018-07-17 |
IL259018A (en) | 2018-06-28 |
BR112018009560A2 (en) | 2018-11-06 |
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