TY JOUR TI PUMP-HOSE SYSTEMS HYDRAULIC CALCULATIONS PROBLEM IN FIRE TACTICS KW fire service KW fire tactic KW fire technic KW fire hoses KW formulas KW pumps KW pump-hose systems JO Siberian Fire and Rescue Bulletin AU Malyutin, O.S. AU Vasilev, S.A. PY 2018 IS 2018 PB FSBEE HE Siberian Fire and Rescue Academy EMERCOM of Russia