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Priority to JP45120957ApriorityCriticalpatent/JPS512491B1/ja
Priority to US00210239Aprioritypatent/US3823118A/en
Priority to IT32850/71Aprioritypatent/IT944312B/it
Priority to DE2165361Aprioritypatent/DE2165361C3/de
Priority to FR7147369Aprioritypatent/FR2120124B1/fr
Publication of JPS512491B1publicationCriticalpatent/JPS512491B1/ja