A.V. Zhuravlev - Ph. D. (Eng.), Senior Research Scientist, Main Designer - Deputy General Director, JSC «SPE «PROTEK» (Voronezh). E-mail: protek@protek-vrn.ru V.M. Bezmaga - Ph. D. (Eng.), Senior Research Scientist, Leading Research Scientist, JSC «SPE «PROTEK» (Voronezh). E-mail: protek@protek-vrn.ru A.V. Smolin - Deputy Head of Department, JSC «SPE «PROTEK» (Voronezh). E-mail: smolinalexe@yandex.ru