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Priority to JP2121174ApriorityCriticalpatent/JPS5517492B2/ja
Priority to US05/546,126prioritypatent/US3943014A/en
Publication of JPS50115980ApublicationCriticalpatent/JPS50115980A/ja
Publication of JPS5517492B2publicationCriticalpatent/JPS5517492B2/ja