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Priority claimed from JP57000337Aexternal-prioritypatent/JPS58118042A/ja
Priority claimed from JP57042756Aexternal-prioritypatent/JPS58161156A/ja
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority claimed from EP82112090Aexternal-prioritypatent/EP0083452B1/de
Application grantedgrantedCritical
Publication of ATE26355T1publicationCriticalpatent/ATE26355T1/de