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Priority to JP47048944ApriorityCriticalpatent/JPS498487A/ja
Priority to GB3931972Aprioritypatent/GB1370552A/en
Priority to NL7211888Aprioritypatent/NL7211888A/xx
Priority to DE2243571Aprioritypatent/DE2243571A1/de
Priority to FR7232004Aprioritypatent/FR2153260B1/fr
Publication of JPS498487ApublicationCriticalpatent/JPS498487A/ja