E.N. Aprelsky - Ph.D. (Eng.), OJSC NNP Respirator (Orehovo-Zuevo, Moscow region) V.H. Zamyatin - Deputy of Chief Designer, OJSC NNP Respirator (Orehovo-Zuevo, Moscow region) S.M. Kastersky - Ph.D. (Eng.), Plechanov Russian Economic University (Moscow). E-mail: kastersm@gmail.com I.M. Sinev - Ph.D. (Eng.), OJSC NNP Respirator (Orehovo-Zuevo, Moscow region) V.N. Chernukha - Dr.Sc. (Eng.), Professor, OJSC NNP Respirator (Orehovo-Zuevo, Moscow region)