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Priority to JP1833577ApriorityCriticalpatent/JPS53102551A/ja
Priority to IT20412/78Aprioritypatent/IT1094213B/it
Priority to FR7804905Aprioritypatent/FR2380938A1/fr
Publication of JPS53102551ApublicationCriticalpatent/JPS53102551A/ja
Publication of JPS5643903B2publicationCriticalpatent/JPS5643903B2/ja