TY JOUR TI METHODS OF THE THEORY OF MASS SERVICE AND NEED OF IMITATING EXPERIMENTS IN THE COURSE OF MAINTENANCE AND REPAIR OF MEANS OF INDIVIDUAL PROTECTION OF RESPIRATORY ORGANS KW ethods of the theory of mass service KW course of maintenance and individual protection of respiratory organsrepair JO Problems of risk management in the technosphere AU Polin’ko, S.V. PY 2014 IS 2014 PB Saint-Petersburg University of State Fire Service of Emercom of Russia