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Publication of SU5479A1publicationCriticalpatent/SU5479A1/ru
Application filed by А.Н. КачановfiledCriticalА.Н. Качанов
Priority to SU10435ApriorityCriticalpatent/SU69512A1/ru
Publication of SU69512A1publicationCriticalpatent/SU69512A1/ru