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Priority to JP1976137019UpriorityCriticalpatent/JPS575267Y2/ja
Priority to US05/841,754prioritypatent/US4159752A/en
Publication of JPS5355133UpublicationCriticalpatent/JPS5355133U/ja
Application grantedgrantedCritical
Publication of JPS575267Y2publicationCriticalpatent/JPS575267Y2/ja