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Priority to JP48047362ApriorityCriticalpatent/JPS5226251B2/ja
Priority to US462774Aprioritypatent/US3904571A/en
Priority to DE19742420376prioritypatent/DE2420376C3/de
Publication of JPS5022ApublicationCriticalpatent/JPS5022A/ja
Publication of JPS5226251B2publicationCriticalpatent/JPS5226251B2/ja