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Priority claimed from JP17185280Aexternal-prioritypatent/JPS5795481A/ja
Priority claimed from JP2167681Aexternal-prioritypatent/JPS57135178A/ja
Application filed by Tokyo Electric Co. Ltd.filedCriticalTokyo Electric Co. Ltd.
Priority claimed from EP81305511Aexternal-prioritypatent/EP0053887B1/de
Application grantedgrantedCritical
Publication of ATE7873T1publicationCriticalpatent/ATE7873T1/de