IT1120229B - Cuscinetto a piu' corone di rulli conici,in particolare per laminatoi - Google Patents
Cuscinetto a piu' corone di rulli conici,in particolare per laminatoiInfo
- Publication number
- IT1120229B IT1120229B IT51131/79A IT5113179A IT1120229B IT 1120229 B IT1120229 B IT 1120229B IT 51131/79 A IT51131/79 A IT 51131/79A IT 5113179 A IT5113179 A IT 5113179A IT 1120229 B IT1120229 B IT 1120229B
- Authority
- IT
- Italy
- Prior art keywords
- bearing
- rolling mills
- conical rollers
- multiple crowns
- crowns
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/37—Loose spacing bodies
- F16C33/3706—Loose spacing bodies with concave surfaces conforming to the shape of the rolling elements, e.g. the spacing bodies are in sliding contact with the rolling elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/07—Adaptation of roll neck bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
- F16C13/02—Bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
- F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
- F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
- F16C19/388—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with four rows, i.e. four row tapered roller bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/40—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings with loose spacing bodies between the rollers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
- F16C33/605—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings with a separate retaining member, e.g. flange, shoulder, guide ring, secured to a race ring, adjacent to the race surface, so as to abut the end of the rolling elements, e.g. rollers, or the cage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/768—Sealings of ball or roller bearings between relatively stationary parts, i.e. static seals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
- F16C33/7813—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for tapered roller bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7886—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/30—Angles, e.g. inclinations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/30—Angles, e.g. inclinations
- F16C2240/34—Contact angles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2322/00—Apparatus used in shaping articles
- F16C2322/12—Rolling apparatus, e.g. rolling stands, rolls
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Sealing Of Bearings (AREA)
- Rolls And Other Rotary Bodies (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/971,919 US4235485A (en) | 1978-12-21 | 1978-12-21 | Unitized multirow tapered roller bearing |
Publications (2)
Publication Number | Publication Date |
---|---|
IT7951131A0 IT7951131A0 (it) | 1979-12-19 |
IT1120229B true IT1120229B (it) | 1986-03-19 |
Family
ID=25518958
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT51131/79A IT1120229B (it) | 1978-12-21 | 1979-12-19 | Cuscinetto a piu' corone di rulli conici,in particolare per laminatoi |
Country Status (17)
Country | Link |
---|---|
US (1) | US4235485A (it) |
JP (1) | JPS602535B2 (it) |
AR (1) | AR219652A1 (it) |
AT (1) | AT385098B (it) |
AU (1) | AU516450B2 (it) |
BE (1) | BE880714A (it) |
BR (1) | BR7908311A (it) |
CA (1) | CA1124771A (it) |
DE (1) | DE2950773C2 (it) |
ES (1) | ES487132A1 (it) |
FR (1) | FR2444840A1 (it) |
GB (1) | GB2041462B (it) |
IN (1) | IN153156B (it) |
IT (1) | IT1120229B (it) |
MX (1) | MX150475A (it) |
NL (1) | NL177513C (it) |
SE (1) | SE438359B (it) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110026275A (zh) * | 2019-04-23 | 2019-07-19 | 唐山盾石电气有限责任公司 | 一种混合瓦推力轴承及其使用方法 |
Families Citing this family (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4384747A (en) * | 1981-03-16 | 1983-05-24 | Hughes Tool Company | Bearing for a shaft cutter stabilizer |
SE428317B (sv) * | 1982-06-03 | 1983-06-20 | Forsheda Ab | Tetningsanordning for avtetning av ett lager |
NL8302055A (nl) * | 1983-06-09 | 1985-01-02 | Skf Ind Trading & Dev | Afdichtring voor een wentellager. |
GB2166811B (en) * | 1984-10-01 | 1988-11-02 | Timken Co | Improvements relating to tapered roller bearings |
US4615627A (en) * | 1984-12-05 | 1986-10-07 | Ntn-Bower | Roller bearing assembly |
JP2564261B2 (ja) * | 1985-01-25 | 1996-12-18 | 日本精工株式会社 | 圧延機ロ−ルネック軸受支持装置 |
CN85108036B (zh) * | 1985-05-06 | 1988-08-17 | 托林顿公司 | 多排滚柱轴承 |
JPH0820785B2 (ja) * | 1987-01-09 | 1996-03-04 | ミノルタ株式会社 | 複写機 |
US4938615A (en) * | 1989-10-26 | 1990-07-03 | The Timken Company | Roll neck bearing |
JP2557924Y2 (ja) * | 1992-01-31 | 1997-12-17 | 光洋精工株式会社 | 圧延機における外輪回転用ころ軸受保持器 |
DE29704386U1 (de) * | 1997-03-11 | 1997-04-24 | Skf Gmbh, 97421 Schweinfurt | Vierreihiges Kegelrollenlager, insbesondere für Arbeitswalzen von Walzgerüsten |
US6334713B1 (en) | 1999-03-23 | 2002-01-01 | Roller Bearing Industries, Inc. | Bearing assembly having an improved wear ring liner |
WO2001013014A1 (en) | 1999-08-16 | 2001-02-22 | Roller Bearing Industries, Inc. | Bearing seal |
JP2003172345A (ja) * | 2001-12-07 | 2003-06-20 | Koyo Seiko Co Ltd | 車軸ピニオン用軸受装置および車両用終減速装置 |
DE102004018188A1 (de) * | 2004-04-14 | 2005-11-10 | Fag Kugelfischer Ag & Co. Ohg | Zweireihiges Schrägwälzlager |
DE102005022205A1 (de) * | 2005-05-13 | 2006-11-16 | Schaeffler Kg | Vierreihiges Kegelrollenlager |
DE102006060677A1 (de) * | 2006-12-21 | 2008-06-26 | Schaeffler Kg | Flüssigkeitsreibungskupplung, beispielsweise für Fahrzeuganwendungen |
DE102010013627A1 (de) | 2010-04-01 | 2011-10-06 | Aktiebolaget Skf | Lageranordnung und Getriebe |
DE102010062477B4 (de) * | 2010-12-06 | 2013-04-11 | Aktiebolaget Skf | Presse zum Pressen eines Materials |
US8696212B2 (en) * | 2012-03-01 | 2014-04-15 | Amsted Rail Company, Inc. | Roller bearing backing ring assembly |
JP6295727B2 (ja) * | 2014-03-03 | 2018-03-20 | 株式会社ジェイテクト | 円すいころ軸受 |
CN104214212A (zh) * | 2014-08-21 | 2014-12-17 | 沈阳罕王精密轴承有限公司 | 一种外圈带齿轮的双列圆锥、圆柱滚子组合轴承 |
US9909453B2 (en) | 2015-05-19 | 2018-03-06 | General Electric Company | Lubrication system for a turbine engine |
US10415429B2 (en) | 2015-09-25 | 2019-09-17 | General Electric Company | Planet gearbox with cylindrical roller bearing with high density roller packing |
US10234018B2 (en) | 2015-10-19 | 2019-03-19 | General Electric Company | Planet gearbox with cylindrical roller bearing with under race lube scheme |
ITUB20156062A1 (it) | 2015-12-01 | 2017-06-01 | Gen Electric | Alloggiamento per l'uso in un motore a turboventilatore e procedimento di lavaggio di fluido da esso. |
DE102016211435A1 (de) * | 2016-06-27 | 2017-12-28 | Aktiebolaget Skf | Lagereinheit und Distanzstück |
DE102016223574A1 (de) * | 2016-11-28 | 2018-05-30 | Minebea Mitsumi Inc. | Wälzlager |
EP3560615A1 (de) * | 2018-04-27 | 2019-10-30 | Primetals Technologies Austria GmbH | Walzgeruest |
CN109027013A (zh) * | 2018-09-29 | 2018-12-18 | 李军 | 一种轴承座防水密封结构 |
CN112943801A (zh) * | 2021-03-18 | 2021-06-11 | 常州克劳诺斯特种轴承制造有限公司 | 一体式中间卡簧、双列无外圈轴承、行星减速机构 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1226345A (en) * | 1916-11-14 | 1917-05-15 | Hyatt Roller Bearing Co | Double-thrust bearing. |
GB418126A (en) * | 1934-01-17 | 1934-10-18 | Timken Roller Bearing Co | Roller bearing |
US2130258A (en) * | 1936-05-25 | 1938-09-13 | Timken Roller Bearing Co | Multiple-row taper roller bearing |
US2160420A (en) * | 1938-08-11 | 1939-05-30 | Timken Roller Bearing Co | Double row roller bearing |
GB625028A (en) * | 1945-05-17 | 1949-06-21 | August Gunnar Ferdinand Wallgr | Improvements in or relating to double row roller bearings |
DE1750844A1 (de) * | 1967-06-16 | 1971-09-30 | Skf Svenska Kullagerfab Ab | Lageranordnung bei Waelzlagern |
DE6930530U (de) * | 1969-07-31 | 1969-12-11 | Skf Kugellagerfabriken Gmbh | Rollenlager |
DE2219466C3 (de) * | 1972-04-21 | 1981-05-27 | Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt | Walzenhalterung für Universalwalzgerüste |
ZA735737B (en) * | 1972-09-15 | 1974-06-26 | Federal Mogul Corp | Preloading and sealing system for clutch bearings |
JPS509383U (it) * | 1973-05-24 | 1975-01-30 | ||
US3966282A (en) * | 1973-08-31 | 1976-06-29 | Republic Steel Corporation | Bearing chocking assembly for mill rolls |
US4092048A (en) * | 1977-02-17 | 1978-05-30 | Usm Corporation | Roll supports with hydrostatic and roller bearings |
-
1978
- 1978-12-21 US US05/971,919 patent/US4235485A/en not_active Expired - Lifetime
-
1979
- 1979-12-07 IN IN1280/CAL/79A patent/IN153156B/en unknown
- 1979-12-10 SE SE7910135A patent/SE438359B/sv unknown
- 1979-12-11 MX MX180441A patent/MX150475A/es unknown
- 1979-12-12 NL NLAANVRAGE7908950,A patent/NL177513C/xx not_active IP Right Cessation
- 1979-12-17 DE DE2950773A patent/DE2950773C2/de not_active Expired
- 1979-12-17 GB GB7943361A patent/GB2041462B/en not_active Expired
- 1979-12-19 IT IT51131/79A patent/IT1120229B/it active
- 1979-12-19 BE BE1/9655A patent/BE880714A/fr not_active IP Right Cessation
- 1979-12-19 BR BR7908311A patent/BR7908311A/pt unknown
- 1979-12-20 CA CA342,415A patent/CA1124771A/en not_active Expired
- 1979-12-20 FR FR7931344A patent/FR2444840A1/fr active Granted
- 1979-12-20 ES ES487132A patent/ES487132A1/es not_active Expired
- 1979-12-20 AT AT0804779A patent/AT385098B/de not_active IP Right Cessation
- 1979-12-20 AU AU54046/79A patent/AU516450B2/en not_active Ceased
- 1979-12-21 AR AR279426A patent/AR219652A1/es active
- 1979-12-21 JP JP54166722A patent/JPS602535B2/ja not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110026275A (zh) * | 2019-04-23 | 2019-07-19 | 唐山盾石电气有限责任公司 | 一种混合瓦推力轴承及其使用方法 |
Also Published As
Publication number | Publication date |
---|---|
SE438359B (sv) | 1985-04-15 |
MX150475A (es) | 1984-05-14 |
AU516450B2 (en) | 1981-06-04 |
NL177513C (nl) | 1985-10-01 |
IN153156B (it) | 1984-06-09 |
ATA804779A (de) | 1987-07-15 |
AT385098B (de) | 1988-02-10 |
DE2950773C2 (de) | 1983-11-03 |
AU5404679A (en) | 1980-08-07 |
JPS5594022A (en) | 1980-07-17 |
ES487132A1 (es) | 1980-06-16 |
BR7908311A (pt) | 1980-07-22 |
US4235485A (en) | 1980-11-25 |
NL7908950A (nl) | 1980-06-24 |
GB2041462B (en) | 1983-03-09 |
FR2444840B1 (it) | 1985-03-29 |
NL177513B (nl) | 1985-05-01 |
SE7910135L (sv) | 1980-06-22 |
AR219652A1 (es) | 1980-08-29 |
FR2444840A1 (fr) | 1980-07-18 |
IT7951131A0 (it) | 1979-12-19 |
BE880714A (fr) | 1980-06-19 |
JPS602535B2 (ja) | 1985-01-22 |
DE2950773A1 (de) | 1980-07-10 |
CA1124771A (en) | 1982-06-01 |
GB2041462A (en) | 1980-09-10 |
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