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Priority to JP1979102784UpriorityCriticalpatent/JPS5731098Y2/ja
Priority to US06/131,802prioritypatent/US4286399A/en
Publication of JPS5619369UpublicationCriticalpatent/JPS5619369U/ja
Application grantedgrantedCritical
Publication of JPS5731098Y2publicationCriticalpatent/JPS5731098Y2/ja