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Application filed by Трест "Златоустметаллургстрой"filedCriticalТрест "Златоустметаллургстрой"
Priority to SU1791924ApriorityCriticalpatent/SU490737A1/ru
Application grantedgrantedCritical
Publication of SU490737A1publicationCriticalpatent/SU490737A1/ru