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Priority to JP48036542ApriorityCriticalpatent/JPS5247419B2/ja
Priority to US00370467Aprioritypatent/US3841239A/en
Publication of JPS49122883ApublicationCriticalpatent/JPS49122883A/ja
Publication of JPS5247419B2publicationCriticalpatent/JPS5247419B2/ja