TY JOUR TI MODERNIZATION THE SYSTEM OF BEARING UNITS LUBRICATION OF A TURBO COMPRESSOR OF THE TRACTOR ENGINE KW turbo-compressor KW bearing unit KW lubrication system KW hydraulic accumulator JO Vestnik of Kazan State Agrarian University AU Galiev, I.G. AU Khafizov, K.. AU Khaliullin , F.. PY 2019 IS 14 PB Kazan state agrarian University