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Priority to JP4946276ApriorityCriticalpatent/JPS52134077A/ja
Priority to FR7712297Aprioritypatent/FR2348969A1/fr
Priority to IT2277777Aprioritypatent/IT1075095B/it
Publication of JPS52134077ApublicationCriticalpatent/JPS52134077A/ja
Publication of JPS5642275B2publicationCriticalpatent/JPS5642275B2/ja