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Application filed by Inst Gornogo Dela Imeni SkochifiledCriticalInst Gornogo Dela Imeni Skochi
Priority to SU874351187ApriorityCriticalpatent/SU1488487A1/ru
Application grantedgrantedCritical
Publication of SU1488487A1publicationCriticalpatent/SU1488487A1/ru