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Priority to JP1976069032UpriorityCriticalpatent/JPS5429238Y2/ja
Priority to US05/765,914prioritypatent/US4122601A/en
Publication of JPS52159934UpublicationCriticalpatent/JPS52159934U/ja
Application grantedgrantedCritical
Publication of JPS5429238Y2publicationCriticalpatent/JPS5429238Y2/ja