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Priority to JP1975012432UpriorityCriticalpatent/JPS558371Y2/ja
Priority to US05/646,049prioritypatent/US4002991A/en
Publication of JPS5194606UpublicationCriticalpatent/JPS5194606U/ja
Application grantedgrantedCritical
Publication of JPS558371Y2publicationCriticalpatent/JPS558371Y2/ja