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Application filed by С.Ф. Безуглый, В.И. ОрловfiledCriticalС.Ф. Безуглый
Priority to SU393317ApriorityCriticalpatent/SU77105A1/ru
Application grantedgrantedCritical
Publication of SU77105A1publicationCriticalpatent/SU77105A1/ru