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Priority to JP5639181UpriorityCriticalpatent/JPS6128466Y2/ja
Priority to EP81110611Aprioritypatent/EP0054945B1/en
Priority to DE8181110611Tprioritypatent/DE3172790D1/de
Publication of JPS57168383UpublicationCriticalpatent/JPS57168383U/ja
Priority to US06/582,143prioritypatent/US4514599A/en
Application grantedgrantedCritical
Publication of JPS6128466Y2publicationCriticalpatent/JPS6128466Y2/ja