TY JOUR TI DESIGN FEATURES OF FREIGHT CAR TRUCKS WITH CASSETTE-TYPE BEARINGS AND RESULTS OF COMPARATIVE TESTS OF VARIOUS BOX UNITS UNDER OPERATING CONDITIONS KW cars KW bearings KW box adapters KW tests KW indicators KW sections KW tracks JO Transport engineering AU Kossov, V.S. AU Lunin, A.A. AU Panin, Y.A. AU Gavryushin, M.A. AU Tikhonov, A.A. PY 2025 IS 2025 PB Bryansk State Technical University