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Priority to JP50119704ApriorityCriticalpatent/JPS5244115A/ja
Priority to US05/721,504prioritypatent/US4068261A/en
Priority to DE2640421Aprioritypatent/DE2640421C3/de
Publication of JPS5244115ApublicationCriticalpatent/JPS5244115A/ja
Publication of JPS5550339B2publicationCriticalpatent/JPS5550339B2/ja