TY JOUR TI TESTING PLANT FOR ENGINE WITH ENERGY EFFICIENT COOLING SYSTEM KW ship engine KW cooling system KW marine pump KW engine testing KW engine conversion KW variator JO Vestnik of Astrakhan State Technical University AU Pokusaev, M.. AU Trifonov, A.. AU Kostyrenko, V.. PY 2021 IS 2021 PB Astrakhan State Technical University