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Priority to JP3939872ApriorityCriticalpatent/JPS49920A/ja
Priority to GB1852973Aprioritypatent/GB1419698A/en
Priority to US352229Aprioritypatent/US3899047A/en
Priority to IT7349515Aprioritypatent/IT984307B/it
Priority to FR7314458Aprioritypatent/FR2181044B1/fr
Publication of JPS49920ApublicationCriticalpatent/JPS49920A/ja