TY JOUR TI FLAT ASYNCHRONOUS ELECTRIC DRIVE OF STONE MILL KW flat electric drive KW stone mill KW frequency and torques KW regulation KW flat asynchronous motor JO Vestnik of Kazan State Agrarian University AU Aipov, R.S. AU Galiullin, R.R. AU Nugumanov, R.R. AU Ziganshin, B.G. PY 2019 IS 14 PB Kazan state agrarian University