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Application filed by Н.М. Алексеев, Г.Е. Береславцев, Н.Я. Демьянов, нов Н.Я. Демь, Г.И. РыжихfiledCriticalН.М. Алексеев
Priority to SU158119ApriorityCriticalpatent/SU42773A1/ru
Application grantedgrantedCritical
Publication of SU42773A1publicationCriticalpatent/SU42773A1/ru