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Application filed by Г.Е. Береславцев, И.А. КирпиченокfiledCriticalГ.Е. Береславцев
Priority to SU43563ApriorityCriticalpatent/SU74867A1/en
Application grantedgrantedCritical
Publication of SU74867A1publicationCriticalpatent/SU74867A1/en