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Application filed by Isaak J Feldstejn, Valerij S Jepifamov, Genrich I Petrusanskij, Alexandr M Bolotnikov, Vladimir F CygankovfiledCriticalIsaak J Feldstejn
Priority to CS856397ApriorityCriticalpatent/CS263495B1/en
Publication of CS639785A1publicationCriticalpatent/CS639785A1/en
Publication of CS263495B1publicationCriticalpatent/CS263495B1/en