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Application filed by Р. Б. Горбовцов, Е. Б. Ковалев и В. К. КоробовfiledCriticalР. Б. Горбовцов, Е. Б. Ковалев и В. К. Коробов
Priority to SU742077630ApriorityCriticalpatent/SU645234A1/ru
Application grantedgrantedCritical
Publication of SU645234A1publicationCriticalpatent/SU645234A1/ru