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Application filed by Н. М. Беленьков , Е. Е. МалицкийfiledCriticalН. М. Беленьков , Е. Е. Малицкий
Priority to SU1656009ApriorityCriticalpatent/SU341377A1/ru
Application grantedgrantedCritical
Publication of SU341377A1publicationCriticalpatent/SU341377A1/ru