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Priority to JP5142773ApriorityCriticalpatent/JPS5820732B2/ja
Priority to US05/446,727prioritypatent/US3974357A/en
Priority to DE19742412091prioritypatent/DE2412091C2/de
Publication of JPS50499ApublicationCriticalpatent/JPS50499A/ja
Publication of JPS5820732B2publicationCriticalpatent/JPS5820732B2/ja