TY JOUR TI STUDY OF THE EFFICIENCY OF APPLICATION OF A MOBILE POLYGON TO INCREASE THE PROFESSIONAL LEVEL OF FIRE DIVISIONS KW efficiency KW rescuers KW extinguishing fires KW work in an unsuitable environment KW level of physical development JO Problems of risk management in the technosphere AU Korolev, D.S. AU Russkikh, D.V. AU Kalach, A.V. PY 2024 IS 2024 PB Saint-Petersburg University of State Fire Service of Emercom of Russia