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Priority to JP2645775ApriorityCriticalpatent/JPS51102177A/ja
Priority to US05/663,819prioritypatent/US4061811A/en
Priority to IT4840876Aprioritypatent/IT1057306B/it
Publication of JPS51102177ApublicationCriticalpatent/JPS51102177A/ja
Publication of JPS5518549B2publicationCriticalpatent/JPS5518549B2/ja