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Priority claimed from JP11586683Aexternal-prioritypatent/JPS6010404A/ja
Priority claimed from JP11586783Aexternal-prioritypatent/JPS6010457A/ja
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority claimed from EP84107472Aexternal-prioritypatent/EP0130572B1/de
Application grantedgrantedCritical
Publication of ATE75336T1publicationCriticalpatent/ATE75336T1/de