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Priority to JP1977022837UpriorityCriticalpatent/JPS5848292Y2/ja
Priority to US05/865,687prioritypatent/US4180376A/en
Publication of JPS53115988UpublicationCriticalpatent/JPS53115988U/ja
Application grantedgrantedCritical
Publication of JPS5848292Y2publicationCriticalpatent/JPS5848292Y2/ja