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Application filed by Д.Г. Числиев, П.Н. ШаблыкинfiledCriticalД.Г. Числиев
Priority to SU44900ApriorityCriticalpatent/SU13873A1/ru
Application grantedgrantedCritical
Publication of SU13873A1publicationCriticalpatent/SU13873A1/ru