E. S. Stepanov - Engineer, JSC - LEMZ R&P Corp.?. E-mail: evgeniybookah@rambler.ru
K. I. Konov - Engineer, JSC - LEMZ R&P Corp.?. E-mail: konov.k.i@gmail.com
K. N. Klimov - Dr.Sc. (Eng.), Leading Research Scientist, JSC - LEMZ R&P Corp.?. E-mail: const0@mail.ru
