TY JOUR TI INSTALLATION FOR DETERMINING THE DISTRIBUTION OF FIRE-EXTINGUISHING POWDER PARTICLES IN THE CROSS-SECTION OF AN UNSTEADY GAS STREAM KW fire extinguishing powder KW powder fire extinguisher KW gas-powder flow KW fractional composition KW distribution of fractions JO Siberian Fire and Rescue Bulletin AU Konstantinova, A.S. AU Kozhevin, D.F. AU Polyakov, A.S. AU Melnik, A.A. PY 2020 IS 2020 PB FSBEE HE Siberian Fire and Rescue Academy EMERCOM of Russia