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Application filed by Б.Б. Васильев, А.М. ЖуравлевfiledCriticalБ.Б. Васильев
Priority to SU189853ApriorityCriticalpatent/SU48269A1/en
Application grantedgrantedCritical
Publication of SU48269A1publicationCriticalpatent/SU48269A1/en