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Application filed by В.Н. Глазанов, Б.Д. СтратьевfiledCriticalВ.Н. Глазанов
Priority to SU380161ApriorityCriticalpatent/SU77702A1/en
Application grantedgrantedCritical
Publication of SU77702A1publicationCriticalpatent/SU77702A1/en