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Priority to JP8381679UpriorityCriticalpatent/JPS5748936Y2/ja
Priority to US06/159,924prioritypatent/US4421350A/en
Publication of JPS561962UpublicationCriticalpatent/JPS561962U/ja
Application grantedgrantedCritical
Publication of JPS5748936Y2publicationCriticalpatent/JPS5748936Y2/ja