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Application filed by Н.Н. Курьянов, нов Н.Н. КурьfiledCriticalН.Н. Курьянов
Priority to SU97703ApriorityCriticalpatent/SU40875A1/en
Application grantedgrantedCritical
Publication of SU40875A1publicationCriticalpatent/SU40875A1/en