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Priority to JP48051426ApriorityCriticalpatent/JPS5754257B2/ja
Priority to US05/446,727prioritypatent/US3974357A/en
Priority to DE19742412091prioritypatent/DE2412091C2/de
Publication of JPS50498ApublicationCriticalpatent/JPS50498A/ja
Publication of JPS5754257B2publicationCriticalpatent/JPS5754257B2/ja