TY JOUR TI Energy index of working units abrasion of agricultural machinery in contact with abrasives KW energy KW working unit KW abrasive material KW abrasion. JO Vestnik of Kazan State Agrarian University AU Belinskiy, A.. AU Semushkin, N.. AU Ziganshin, B.G. AU Yakhin, S.M. PY 2014 IS 8 PB Kazan state agrarian University