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Priority to JP13434980UpriorityCriticalpatent/JPS607993Y2/ja
Priority to US06/241,642prioritypatent/US4437848A/en
Priority to EP81301077Aprioritypatent/EP0036317B1/en
Priority to DE8181301077Tprioritypatent/DE3176837D1/de
Publication of JPS5759791UpublicationCriticalpatent/JPS5759791U/ja
Application grantedgrantedCritical
Publication of JPS607993Y2publicationCriticalpatent/JPS607993Y2/ja