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Priority to JP2387373ApriorityCriticalpatent/JPS49111815A/ja
Priority to GB3216373Aprioritypatent/GB1441164A/en
Priority to IT2633473Aprioritypatent/IT991101B/it
Priority to FR7324964Aprioritypatent/FR2192179B1/fr
Publication of JPS49111815ApublicationCriticalpatent/JPS49111815A/ja