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Application filed by Ф.С. Семячков, чков Ф.С. СемfiledCriticalФ.С. Семячков
Priority to SU24238ApriorityCriticalpatent/SU9642A1/ru
Application grantedgrantedCritical
Publication of SU9642A1publicationCriticalpatent/SU9642A1/ru