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Priority to JP1977077554UpriorityCriticalpatent/JPS5728164Y2/ja
Priority to CH905877Aprioritypatent/CH618282A5/de
Priority to DE2733022Aprioritypatent/DE2733022C2/de
Publication of JPS543948UpublicationCriticalpatent/JPS543948U/ja
Priority to US06/305,203prioritypatent/US4374610A/en
Application grantedgrantedCritical
Publication of JPS5728164Y2publicationCriticalpatent/JPS5728164Y2/ja