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Priority to JP1980094135UpriorityCriticalpatent/JPS6328470Y2/ja
Priority to US06/272,029prioritypatent/US4351222A/en
Publication of JPS5719986UpublicationCriticalpatent/JPS5719986U/ja
Application grantedgrantedCritical
Publication of JPS6328470Y2publicationCriticalpatent/JPS6328470Y2/ja