它是我国国铁路网中唯一运营的米轨铁路，近些年来，米轨铁路的运量逐年增长，机车车辆的技术也有了长足的进步。
It is an important international passage between China and Southeast Asia, which is only one using meter-gage railway in nation road net as yet, have been improved it's traffic volume rapidly.
型机车是为越南铁路生产的干线客、货运米轨电传动内燃机车。
CKD 7f locomotive is a diesel-electric passenger and freight locomotive for meter gauge trunk line in Viet-Nam.
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