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Application filedfiledCritical
Priority to JP1981058806UpriorityCriticalpatent/JPS622857Y2/ja
Priority to DE8181110611Tprioritypatent/DE3172790D1/de
Priority to EP81110611Aprioritypatent/EP0054945B1/en
Publication of JPS57171368UpublicationCriticalpatent/JPS57171368U/ja
Priority to US06/582,143prioritypatent/US4514599A/en
Application grantedgrantedCritical
Publication of JPS622857Y2publicationCriticalpatent/JPS622857Y2/ja