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Priority claimed from JP56175678Aexternal-prioritypatent/JPS5877391A/ja
Priority claimed from JP56175673Aexternal-prioritypatent/JPS5877387A/ja
Priority claimed from JP56175677Aexternal-prioritypatent/JPS5877390A/ja
Priority claimed from JP57037996Aexternal-prioritypatent/JPS58156285A/ja
Priority claimed from JP57037994Aexternal-prioritypatent/JPS58156283A/ja
Priority claimed from JP57053820Aexternal-prioritypatent/JPS58172092A/ja
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority claimed from EP82110123Aexternal-prioritypatent/EP0078542B1/de
Application grantedgrantedCritical
Publication of ATE27883T1publicationCriticalpatent/ATE27883T1/de