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Publication date
Application filed by Н.П. Красников, Б.Е. РозенфельдfiledCriticalН.П. Красников
Priority to SU41997ApriorityCriticalpatent/SU65491A1/ru
Application grantedgrantedCritical
Publication of SU65491A1publicationCriticalpatent/SU65491A1/ru