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Priority to JP3816474ApriorityCriticalpatent/JPS5921007B2/ja
Priority to US05/486,368prioritypatent/US3994003A/en
Publication of JPS50131518ApublicationCriticalpatent/JPS50131518A/ja
Publication of JPS5921007B2publicationCriticalpatent/JPS5921007B2/ja