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Priority to JP6110180UpriorityCriticalpatent/JPS6216784Y2/ja
Priority to EP81103108Aprioritypatent/EP0039064B1/en
Priority to US06/257,133prioritypatent/US4401391A/en
Priority to DE8181103108Tprioritypatent/DE3168437D1/de
Publication of JPS56161989UpublicationCriticalpatent/JPS56161989U/ja
Application grantedgrantedCritical
Publication of JPS6216784Y2publicationCriticalpatent/JPS6216784Y2/ja