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Priority to JP1007869ApriorityCriticalpatent/JPS491717B1/ja
Priority to GB563170Aprioritypatent/GB1307941A/en
Priority to DE19702006075prioritypatent/DE2006075A1/de
Priority to FR7005263Aprioritypatent/FR2035437A5/fr
Publication of JPS491717B1publicationCriticalpatent/JPS491717B1/ja