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Priority to JP1980082169UpriorityCriticalpatent/JPS621527Y2/ja
Priority to US06/265,068prioritypatent/US4390003A/en
Publication of JPS5710607UpublicationCriticalpatent/JPS5710607U/ja
Application grantedgrantedCritical
Publication of JPS621527Y2publicationCriticalpatent/JPS621527Y2/ja