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Priority to JP1979153888UpriorityCriticalpatent/JPS62644Y2/ja
Priority to US06/139,142prioritypatent/US4367018A/en
Priority to GB8012066Aprioritypatent/GB2049216B/en
Priority to DE3017668Aprioritypatent/DE3017668C2/de
Publication of JPS5671209UpublicationCriticalpatent/JPS5671209U/ja
Application grantedgrantedCritical
Publication of JPS62644Y2publicationCriticalpatent/JPS62644Y2/ja