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Priority to JP48070066ApriorityCriticalpatent/JPS5020764A/ja
Priority to DE2425254Aprioritypatent/DE2425254C3/de
Priority to US05/472,958prioritypatent/US3937004A/en
Priority to FR7418432Aprioritypatent/FR2232006B1/fr
Publication of JPS5020764ApublicationCriticalpatent/JPS5020764A/ja