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Priority to JP17561282UpriorityCriticalpatent/JPS5979660U/ja
Priority to US06/505,753prioritypatent/US4638897A/en
Priority to GB08317204Aprioritypatent/GB2123906B/en
Publication of JPS5979660UpublicationCriticalpatent/JPS5979660U/ja
Application grantedgrantedCritical
Publication of JPS6128129Y2publicationCriticalpatent/JPS6128129Y2/ja