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Priority to JP6938072ApriorityCriticalpatent/JPS5229942B2/ja
Priority to GB418373Aprioritypatent/GB1425182A/en
Priority to CA164,279Aprioritypatent/CA1014243A/en
Publication of JPS4931339ApublicationCriticalpatent/JPS4931339A/ja
Priority to US05/641,496prioritypatent/US4022977A/en
Publication of JPS5229942B2publicationCriticalpatent/JPS5229942B2/ja