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Priority to JP1976091945UpriorityCriticalpatent/JPS5616310Y2/ja
Priority to US05/813,340prioritypatent/US4165941A/en
Publication of JPS5312030UpublicationCriticalpatent/JPS5312030U/ja
Application grantedgrantedCritical
Publication of JPS5616310Y2publicationCriticalpatent/JPS5616310Y2/ja