TY JOUR TI IMPROVING THE TRIBOTECHNICAL CHARACTERISTICS OF THE LUBRICANT INTENDED FOR LUBRICATING THE WHEEL FLANGE OF THE MAINLINE LOCOMOTIVE KW flange KW wheel KW lubricant KW additive KW hydrogen wear JO Bulletin of Bryansk state technical university AU Shalygin, M.G. AU Vashchishina, A.P. PY 2021 IS 2021 PB Bryansk State Technical University