Choriev Rustam, 3rd year bachelor Department of "Railway Engineering" Tashkent State Transport University, Tashkent (Scientific supervisor - Umarov Kh, Cand. of Technical Sciences, Associate Professor)
S. T. Djabbarov¹, N. B. Kodirov², M. E. Razzokov³ ¹ Tashkent State Transport University, 1 Temiryulchilar Street, Tashkent 100167, Uzbekistan; e-mail: _saidhon_@inbox.ru ² Tashkent State Transport University, 1 Temiryulchilar Street, Tashkent 100167, Uzbe