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Application filed by М.Д. Мудрецов-ГольдбергfiledCriticalМ.Д. Мудрецов-Гольдберг
Priority to SU133845ApriorityCriticalpatent/SU42676A1/ru
Application grantedgrantedCritical
Publication of SU42676A1publicationCriticalpatent/SU42676A1/ru