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Priority claimed from JP61182998Aexternal-prioritypatent/JPH0668144B2/ja
Application filed by Sumitomo Spec MetalsfiledCriticalSumitomo Spec Metals
Priority claimed from EP19870111257external-prioritypatent/EP0255939B1/de
Application grantedgrantedCritical
Publication of ATE92209T1publicationCriticalpatent/ATE92209T1/de