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Priority to JP7357281UpriorityCriticalpatent/JPS638038Y2/ja
Priority to EP81109035Aprioritypatent/EP0051257B1/en
Priority to DE8181109035Tprioritypatent/DE3166200D1/de
Priority to US06/316,283prioritypatent/US4409448A/en
Publication of JPS57185141UpublicationCriticalpatent/JPS57185141U/ja
Application grantedgrantedCritical
Publication of JPS638038Y2publicationCriticalpatent/JPS638038Y2/ja