TY JOUR TI IMPROVING OF THE CONSTRUCTION OF POWDER FIRE EXTINGUISHER WITH A POROUS CONTAINER FOR THE EXTINGUISHING AGENT KW fire extinguisher KW fire extinguishing powder KW construction KW porous container KW solid particles KW movement JO Siberian Fire and Rescue Bulletin AU Polyakov, A.S. AU Kozhevin, D.F. AU Sorokin, I.A. PY 2019 IS 2019 PB FSBEE HE Siberian Fire and Rescue Academy EMERCOM of Russia