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Application filed by В.К. Ляпидевский, пидевский В.К. ЛfiledCriticalВ.К. Ляпидевский
Priority to SU1167ApriorityCriticalpatent/SU74123A1/ru
Application grantedgrantedCritical
Publication of SU74123A1publicationCriticalpatent/SU74123A1/ru