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Priority to JP2691480UpriorityCriticalpatent/JPH019966Y2/ja
Priority to EP80304719Aprioritypatent/EP0031726B1/en
Priority to DE8080304719Tprioritypatent/DE3069812D1/de
Priority to US06/220,721prioritypatent/US4386845A/en
Publication of JPS56128667UpublicationCriticalpatent/JPS56128667U/ja
Priority to US06/464,065prioritypatent/US4478506A/en
Application grantedgrantedCritical
Publication of JPH019966Y2publicationCriticalpatent/JPH019966Y2/ja