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Application filed by М.А. Абрамова, М.Н. ТиличенкоfiledCriticalМ.А. Абрамова
Priority to SU574970ApriorityCriticalpatent/SU116078A1/ru
Application grantedgrantedCritical
Publication of SU116078A1publicationCriticalpatent/SU116078A1/ru