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Priority to JP13134977UpriorityCriticalpatent/JPS585063Y2/ja
Priority to US05/916,751prioritypatent/US4202297A/en
Publication of JPS549220UpublicationCriticalpatent/JPS549220U/ja
Application grantedgrantedCritical
Publication of JPS585063Y2publicationCriticalpatent/JPS585063Y2/ja