TY JOUR TI THEORETICAL JUSTIFICATION OF THE ASSESSMENT OF THE TECHNICAL CONDITION OF THE INTERNAL COMBUSTION ENGINE BY THE VALUE OF THE TOTAL EMF IN FRICTION PAIRS KW wear KW EMF KW host friction micropore KW the potential difference engine JO Vestnik of Kazan State Agrarian University AU Salahutdinov, I.R. AU Gluschenko, A.A. AU Molochnikov, D.E. AU Petryakov, S.N. AU Gayaziev, I.. PY 2021 IS 16 PB Kazan state agrarian University