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Priority to JP16412376UpriorityCriticalpatent/JPS5381364U/ja
Priority to US05/857,458prioritypatent/US4234771A/en
Priority to DE2754547Aprioritypatent/DE2754547C3/de
Priority to GB51422/77Aprioritypatent/GB1590989A/en
Publication of JPS5381364UpublicationCriticalpatent/JPS5381364U/ja