NTA

Tshwj xeeb tsim los rau kev ua haujlwm hauv lub tsheb, uas muaj kev yaig tsis kam rau cua, Frost, nag thiab daus, ya raws thiab kub tsis kam, cuam tshuam thiab kev co tsis kam, thiab ua tau raws li lub zog xav tau ntawm diesel thiab hluav taws xob locomotives.Haum rau freight thiab neeg nrog caij locomotives, high-speed tsheb ciav hlau, nroog rail transit.