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Priority claimed from JP57156603Aexternal-prioritypatent/JPS5947890A/ja
Priority claimed from JP57158101Aexternal-prioritypatent/JPS5949089A/ja
Priority claimed from JP57158103Aexternal-prioritypatent/JPS5949090A/ja
Priority claimed from JP58011558Aexternal-prioritypatent/JPS59138186A/ja
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority claimed from EP83108931Aexternal-prioritypatent/EP0103286B1/de
Application grantedgrantedCritical
Publication of ATE50679T1publicationCriticalpatent/ATE50679T1/de