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Priority to JP48047363ApriorityCriticalpatent/JPS5226252B2/ja
Priority to US462774Aprioritypatent/US3904571A/en
Priority to DE19742420376prioritypatent/DE2420376C3/de
Publication of JPS5023ApublicationCriticalpatent/JPS5023A/ja
Publication of JPS5226252B2publicationCriticalpatent/JPS5226252B2/ja