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Application filed by К. С. Махотин , Е. А. МатросовfiledCriticalК. С. Махотин , Е. А. Матросов
Priority to SU1750537ApriorityCriticalpatent/SU430029A1/ru
Application grantedgrantedCritical
Publication of SU430029A1publicationCriticalpatent/SU430029A1/ru