TY JOUR TI PROBLEMS IN DEVELOPMENT OF ENERGY-SAVING TRACTION DRIVE KW locomotive traction KW adhesion KW wheel KW rail KW anti-boxing devices KW drive KW locomotive JO Bulletin of Bryansk state technical university AU Antipin, D.Y. AU Izmerov, O.V. AU Zhirov, P.D. PY 2021 IS 2021 PB Bryansk State Technical University