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Priority to JP15776980UpriorityCriticalpatent/JPS6239321Y2/ja
Priority to US06/218,237prioritypatent/US4339318A/en
Publication of JPS5779761UpublicationCriticalpatent/JPS5779761U/ja
Application grantedgrantedCritical
Publication of JPS6239321Y2publicationCriticalpatent/JPS6239321Y2/ja