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Priority to JP1976030700UpriorityCriticalpatent/JPS5741874Y2/ja
Priority to US05/716,834prioritypatent/US4059319A/en
Publication of JPS52122798UpublicationCriticalpatent/JPS52122798U/ja
Application grantedgrantedCritical
Publication of JPS5741874Y2publicationCriticalpatent/JPS5741874Y2/ja