机车车辆运用 meaning in English

rolling stock operation

The length of railways in operation is an important indicator to show the development of the intra ? structure for the railway transport , and also the essential data to calculate volume of passenger freight transport , traffic density and utilization efficiency of the locomotives and carriages
铁路营业里程是反映铁路运输业基础设施发展水平的重要指标，也是计算客货周转量、运输密度和机车车辆运用效率等指标的基础资料。