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Priority to JP1977043379UpriorityCriticalpatent/JPS5735662Y2/ja
Priority to US05/865,687prioritypatent/US4180376A/en
Publication of JPS53137953UpublicationCriticalpatent/JPS53137953U/ja
Application grantedgrantedCritical
Publication of JPS5735662Y2publicationCriticalpatent/JPS5735662Y2/ja