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Priority to JP17073280UpriorityCriticalpatent/JPS621901Y2/ja
Priority to US06/251,762prioritypatent/US4422259A/en
Priority to EP81301772Aprioritypatent/EP0039198B1/en
Priority to DE8181301772Tprioritypatent/DE3161933D1/de
Publication of JPS5791470UpublicationCriticalpatent/JPS5791470U/ja
Application grantedgrantedCritical
Publication of JPS621901Y2publicationCriticalpatent/JPS621901Y2/ja