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Priority to JP2464876ApriorityCriticalpatent/JPS52108729A/ja
Priority to CA272,030Aprioritypatent/CA1080346A/en
Priority to US05/769,784prioritypatent/US4118741A/en
Publication of JPS52108729ApublicationCriticalpatent/JPS52108729A/ja
Publication of JPS5616996B2publicationCriticalpatent/JPS5616996B2/ja