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Priority to JP46038728ApriorityCriticalpatent/JPS5246347B1/ja
Priority to GB2052072Aprioritypatent/GB1361902A/en
Priority to DE19722223037prioritypatent/DE2223037C2/de
Priority to FR7219211Aprioritypatent/FR2140072B1/fr
Publication of JPS5246347B1publicationCriticalpatent/JPS5246347B1/ja