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Priority to JP1979104884UpriorityCriticalpatent/JPS5816917Y2/ja
Priority to US06/173,907prioritypatent/US4349247A/en
Publication of JPS5623903UpublicationCriticalpatent/JPS5623903U/ja
Application grantedgrantedCritical
Publication of JPS5816917Y2publicationCriticalpatent/JPS5816917Y2/ja