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Application filed by О.Ю. Магидсон, М.Я. ФедотоваfiledCriticalО.Ю. Магидсон
Priority to SU5223ApriorityCriticalpatent/SU68310A1/ru
Application grantedgrantedCritical
Publication of SU68310A1publicationCriticalpatent/SU68310A1/ru