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Application filed by Б. И. Крук , П. Я. Нудельман, Одесский электротехнический институт А. С. ПоповаfiledCriticalБ. И. Крук , П. Я. Нудельман
Priority to SU1730623ApriorityCriticalpatent/SU432682A1/ru
Application grantedgrantedCritical
Publication of SU432682A1publicationCriticalpatent/SU432682A1/ru