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Priority to JP1978149093UpriorityCriticalpatent/JPS6145506Y2/ja
Publication of JPS5567435UpublicationCriticalpatent/JPS5567435U/ja
Priority to US06/313,580prioritypatent/US4459036A/en
Application grantedgrantedCritical
Publication of JPS6145506Y2publicationCriticalpatent/JPS6145506Y2/ja