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Publication of SU372765A1publicationCriticalpatent/SU372765A1/ru
Application filed by В.А. ВаргановfiledCriticalВ.А. Варганов
Priority to SU4148ApriorityCriticalpatent/SU2427A1/ru
Application grantedgrantedCritical
Publication of SU2427A1publicationCriticalpatent/SU2427A1/ru