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Application filed by Д.Д. Бондарев, Г.Я. Брамлит, М.М. ВасильевfiledCriticalД.Д. Бондарев
Priority to SU143928ApriorityCriticalpatent/SU41820A1/ru
Application grantedgrantedCritical
Publication of SU41820A1publicationCriticalpatent/SU41820A1/ru