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Priority to JP1976094116UpriorityCriticalpatent/JPS593645Y2/ja
Priority to US05/816,219prioritypatent/US4144413A/en
Publication of JPS5313016UpublicationCriticalpatent/JPS5313016U/ja
Application grantedgrantedCritical
Publication of JPS593645Y2publicationCriticalpatent/JPS593645Y2/ja