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Application filed by Ульяновский политехнический институтfiledCriticalУльяновский политехнический институт
Priority to SU2592458/25ApriorityCriticalpatent/SU749352A1/ru
Application grantedgrantedCritical
Publication of RU749352CpublicationCriticalpatent/RU749352C/ru
Publication of SU749352A1publicationCriticalpatent/SU749352A1/ru