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Priority to JP2526073ApriorityCriticalpatent/JPS545962B2/ja
Priority to US442147Aprioritypatent/US3915408A/en
Priority to DE2407391Aprioritypatent/DE2407391C3/de
Publication of JPS49107508ApublicationCriticalpatent/JPS49107508A/ja
Publication of JPS545962B2publicationCriticalpatent/JPS545962B2/ja