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Priority to JP1974134364UpriorityCriticalpatent/JPS5215683Y2/ja
Priority to US05/581,878prioritypatent/US3974704A/en
Publication of JPS5160701UpublicationCriticalpatent/JPS5160701U/ja
Application grantedgrantedCritical
Publication of JPS5215683Y2publicationCriticalpatent/JPS5215683Y2/ja