M.N. Chesnokov - Dr.Sc. (Eng.), Professor, Head of Department, LTD «Special Technological Center» (St. Petersburg). E-mail: chesnokovmn@yandex.ru A.A. Soloviev - Engineer, LTD «Special Technological Center» (St. Petersburg). E-mail: alanight@mail.ru A.A. Litvinov - Engineer, LTD «Special Technological Center» (St. Petersburg). E-mail: alalli.spb@gmail.com