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Application filed by А.С. Ларионова, Ф.Ф. ЛевченкоfiledCriticalА.С. Ларионова
Priority to SU1161-47ApriorityCriticalpatent/SU71622A1/en
Application grantedgrantedCritical
Publication of SU71622A1publicationCriticalpatent/SU71622A1/en