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Priority to JP17656180UpriorityCriticalpatent/JPS6127321Y2/ja
Priority to US06/273,493prioritypatent/US4401347A/en
Priority to DE8181105153Tprioritypatent/DE3172430D1/de
Priority to EP81105153Aprioritypatent/EP0053651B1/en
Publication of JPS5798961UpublicationCriticalpatent/JPS5798961U/ja
Application grantedgrantedCritical
Publication of JPS6127321Y2publicationCriticalpatent/JPS6127321Y2/ja