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Application filed by Н.Г. Залогин, В.Л. ШнеерсонfiledCriticalН.Г. Залогин
Priority to SU195834ApriorityCriticalpatent/SU50446A1/en
Application grantedgrantedCritical
Publication of SU50446A1publicationCriticalpatent/SU50446A1/en