BR8707364A - Camada metalica de suporte e processo de fabricacao da mesma - Google Patents

Camada metalica de suporte e processo de fabricacao da mesma

Info

Publication number
BR8707364A
BR8707364A BR8707364A BR8707364A BR8707364A BR 8707364 A BR8707364 A BR 8707364A BR 8707364 A BR8707364 A BR 8707364A BR 8707364 A BR8707364 A BR 8707364A BR 8707364 A BR8707364 A BR 8707364A
Authority
BR
Brazil
Prior art keywords
manufacturing process
support layer
metallic support
metallic
layer
Prior art date
Application number
BR8707364A
Other languages
English (en)
Inventor
Erich Hodes
Ulrich Engel
Heiko Gruner
Original Assignee
Glyco Metall Werke
Plasmainvent Ag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Glyco Metall Werke, Plasmainvent Ag filed Critical Glyco Metall Werke
Publication of BR8707364A publication Critical patent/BR8707364A/pt

Links

Classifications

    • 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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • 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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • 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
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
    • 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
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/14—Special methods of manufacture; Running-in
    • 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
    • F16C2204/00—Metallic materials; Alloys
    • F16C2204/20—Alloys based on aluminium
    • 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
    • F16C2204/00—Metallic materials; Alloys
    • F16C2204/20—Alloys based on aluminium
    • F16C2204/22—Alloys based on aluminium with tin as the next major constituent
    • 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
    • F16C2204/00—Metallic materials; Alloys
    • F16C2204/20—Alloys based on aluminium
    • F16C2204/24—Alloys based on aluminium with lead as the next major constituent
    • 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
    • F16C2204/00—Metallic materials; Alloys
    • F16C2204/60—Ferrous alloys, e.g. steel alloys
    • 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
    • F16C2220/00—Shaping
    • F16C2220/02—Shaping by casting
    • 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
    • F16C2220/00—Shaping
    • F16C2220/60—Shaping by removing material, e.g. machining
    • 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
    • F16C2223/00—Surface treatments; Hardening; Coating
    • F16C2223/02—Mechanical treatment, e.g. finishing
    • F16C2223/08—Mechanical treatment, e.g. finishing shot-peening, blasting
    • 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
    • F16C2223/00—Surface treatments; Hardening; Coating
    • F16C2223/30—Coating surfaces
    • F16C2223/42—Coating surfaces by spraying the coating material, e.g. plasma spraying
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S384/00—Bearings
    • Y10S384/90—Cooling or heating
    • Y10S384/912—Metallic
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S384/00—Bearings
    • Y10S384/90—Cooling or heating
    • Y10S384/913—Metallic compounds
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9335—Product by special process
    • Y10S428/937—Sprayed metal
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12458—All metal or with adjacent metals having composition, density, or hardness gradient
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12736—Al-base component
    • Y10T428/1275—Next to Group VIII or IB metal-base component
    • Y10T428/12757—Fe
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12903—Cu-base component

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Sliding-Contact Bearings (AREA)
  • Electroplating Methods And Accessories (AREA)
BR8707364A 1986-06-25 1987-06-25 Camada metalica de suporte e processo de fabricacao da mesma BR8707364A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863621184 DE3621184A1 (de) 1986-06-25 1986-06-25 Schichtwerkstoff sowie verfahren zu seiner herstellung durch vakuum-plasma-spritzen
PCT/EP1987/000334 WO1988000251A2 (fr) 1986-06-25 1987-06-25 Couche de metal antifriction et procede pour sa fabrication

Publications (1)

Publication Number Publication Date
BR8707364A true BR8707364A (pt) 1988-09-13

Family

ID=6303608

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8707364A BR8707364A (pt) 1986-06-25 1987-06-25 Camada metalica de suporte e processo de fabricacao da mesma

Country Status (6)

Country Link
US (1) US4900639A (pt)
EP (1) EP0270670B1 (pt)
JP (1) JPH01500763A (pt)
BR (1) BR8707364A (pt)
DE (2) DE3621184A1 (pt)
WO (1) WO1988000251A2 (pt)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3640767A1 (de) * 1986-10-30 1988-05-05 Kolbenschmidt Ag Lagerung
DE3721008A1 (de) * 1987-06-25 1988-10-20 Glyco Metall Werke Schichtwerkstoff oder schichtwerkstoffelement sowie verfahren zu seiner herstellung durch vakuum-plasma-spritzen
DE3802920C1 (pt) * 1988-02-02 1989-05-03 Goetze Ag, 5093 Burscheid, De
DE3813802A1 (de) * 1988-04-23 1989-11-09 Glyco Metall Werke Schichtwerkstoff oder schichtwerkstueck mit einer auf einer traegerschicht angebrachten funktionsschicht, insbesondere gleitschicht mit der struktur einer festen, aber schmelzbaren dispersion
DE3813803A1 (de) * 1988-04-23 1989-11-09 Glyco Metall Werke Schichtwerkstoff oder schichtwerkstueck und verfahren zu seiner herstellung
DE3813804A1 (de) * 1988-04-23 1989-11-09 Glyco Metall Werke Schichtwerkstoff oder schichtwerkstueck und verfahren zu seiner herstellung
GB8915254D0 (en) * 1989-07-03 1989-08-23 T & N Technology Ltd Bearings
JPH05500688A (ja) * 1989-07-10 1993-02-12 フェデラル―モーギュル・コーポレーション アルミニウム―鉛エンジン軸受け合金冶金学的構造体とその製造方法
JP2601555B2 (ja) * 1989-11-20 1997-04-16 大同メタル工業 株式会社 多層すべり軸受材
CA2034568C (en) * 1990-01-19 1995-08-29 Yoshikazu Fujisawa Slide member
US5770323A (en) * 1991-02-20 1998-06-23 T & N Technology Limited Bearings
JP2572000B2 (ja) * 1992-12-03 1997-01-16 本田技研工業株式会社 摺動面構成体
DE4342436C2 (de) * 1992-12-23 1997-01-30 Renk Ag Gleitlager mit einer Lagerschale
US5433531A (en) * 1993-09-21 1995-07-18 Federal-Mogul Corporation Engine bearing surface treatment
AT400174B (de) * 1994-02-21 1995-10-25 Miba Gleitlager Ag Gleitlager
JPH1046314A (ja) * 1996-08-06 1998-02-17 Kubota Corp 外面耐食管の製造方法
EP1000257B1 (de) * 1997-07-28 2006-11-15 Volkswagen Aktiengesellschaft Pleuel mit einem lagermetall
US6367151B1 (en) 1997-07-28 2002-04-09 Volkswagen Ag Connecting rod with thermally sprayed bearing layer
FR2775034B1 (fr) * 1998-02-17 2000-04-07 Renault Materiau multicouches, coussinet de moteur forme d'un tel materiau et procede de fabrication
EP1064414B1 (en) * 1998-03-14 2002-08-07 Dana Corporation Forming a plain bearing lining
DE19905213A1 (de) * 1999-02-09 2000-08-31 Sms Demag Ag Gleitlager
JP2002060870A (ja) * 2000-08-24 2002-02-28 Taiho Kogyo Co Ltd 微細鉛組織を有するＣｕ−Ｐｂ系銅合金及び内燃機関用すべり軸受
DE102004006635A1 (de) * 2004-02-10 2005-08-25 Volkswagen Ag Radialgleitlager
JP4653406B2 (ja) * 2004-03-10 2011-03-16 株式会社アルバック 水崩壊性Ａｌ複合材料、水崩壊性Ａｌ溶射膜、及び水崩壊性Ａｌ粉の製造方法、並びに成膜室用構成部材及び成膜材料の回収方法
US8057203B2 (en) 2008-10-02 2011-11-15 Gap Engineering LLC Pyrospherelator
WO2014014541A2 (en) * 2012-04-27 2014-01-23 Directed Vapor Technologies International Wear resistant coatings and process for the application thereof
WO2014128196A2 (de) * 2013-02-21 2014-08-28 Hsp Schwahlen Gmbh Lagerkomponente eines wälz- oder gleitlagers sowie verfahren zu deren herstellung
US9863030B2 (en) * 2015-03-02 2018-01-09 GM Global Technology Operations LLC Stress relief of mechanically roughened cylinder bores for reduced cracking tendency
EP3064613B1 (de) * 2015-03-03 2018-08-01 MTV Metallveredlung GmbH & Co. KG Schichtsystem mit verbesserter Korrosionsbeständigkeit und Verschleißfestigkeit
IT201900001321A1 (it) * 2019-01-30 2020-07-30 Ima Spa Metodo per la realizzazione di un dispositivo operatore automatico articolato e relativo dispositivo operatore automatico articolato.
CN114920559A (zh) * 2022-06-07 2022-08-19 西北工业大学 一种热障涂层用高熵氧化物粉末材料及其制备方法和应用

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* Cited by examiner, † Cited by third party
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US2233304A (en) * 1936-09-16 1941-02-25 Bleakley Corp Apparatus for depositing fluent materials
US3332752A (en) * 1963-08-22 1967-07-25 Raybestos Manhattan Inc Composite flame spraying wire
GB1083003A (en) * 1964-10-23 1967-09-13 Glacier Co Ltd Hot metal spraying of bearing materials
US3950141A (en) * 1970-11-02 1976-04-13 Glyco-Metall-Werke Daden & Loos Gmbh Sliding friction bearings
US3941903A (en) * 1972-11-17 1976-03-02 Union Carbide Corporation Wear-resistant bearing material and a process for making it
JPS52136818A (en) * 1976-05-13 1977-11-15 Daido Metal Co Ltd Bearing metal for large size engine
JPS5433825A (en) * 1977-08-22 1979-03-12 Daido Metal Co Ltd Bearing metal for large engine
DE3242543C2 (de) * 1982-11-18 1985-09-19 Glyco-Metall-Werke Daelen & Loos Gmbh, 6200 Wiesbaden Schichtwerkstoff mit einer auf einer metallischen Trägerschicht aufgebrachten Funktionsschicht aus metallischer Suspensionslegierung und Verfahren zu seiner Herstellung
JPS6035987A (ja) * 1983-08-04 1985-02-23 Canon Inc モ−タの制御装置
JPS6039748A (ja) * 1983-08-12 1985-03-01 Jeol Ltd イオンビ−ム集束装置
DE3422718A1 (de) * 1984-06-19 1986-01-09 Plasmainvent AG, Zug Vakuum-plasma-beschichtungsanlage

Also Published As

Publication number Publication date
EP0270670A1 (de) 1988-06-15
EP0270670B1 (de) 1992-09-02
JPH01500763A (ja) 1989-03-16
US4900639A (en) 1990-02-13
DE3781524D1 (de) 1992-10-08
WO1988000251A3 (fr) 1988-02-11
DE3621184A1 (de) 1988-01-07
WO1988000251A2 (fr) 1988-01-14

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