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Priority to JP1980151734UpriorityCriticalpatent/JPS6223462Y2/ja
Priority to EP81107173Aprioritypatent/EP0048410B1/en
Priority to DE8181107173Tprioritypatent/DE3169553D1/de
Priority to US06/302,468prioritypatent/US4418689A/en
Publication of JPS5774005UpublicationCriticalpatent/JPS5774005U/ja
Application grantedgrantedCritical
Publication of JPS6223462Y2publicationCriticalpatent/JPS6223462Y2/ja