Railways have benefited from such technological improvements as double-stacked rail cars and better software for managing both rolling stock and supply chains.

铁路（公司）也因技术改进而受益，例如双垛轨道车，而且有更好的软件管理全部机车和供应链。

youdao

It may decrease fatigue damage causing by rolling contact and side damage on track and prolong rail service life 0.5 ~ 1 time by means of grinding rail track.

通过对钢轨的修磨可减少由于滚动接触疲劳引起的钢轨损伤，减少钢轨侧面磨损，可延长钢轨的使用寿命0.5 ~ 1倍。

youdao

Rail must provide continuous, smooth, least resistance of rolling surfaces and good adhesion of traction to the train wheels.

钢轨必须为车轮提供连续、平顺和阻力最小的滚动表面，还应提供较好的粘着牵引力。

youdao

This limited secondary market, the rail operators argue, means that they cannot justify spending large sums on rolling stock unless they are sure of keeping their franchises long enough to recover their investments.

ECONOMIST: After privatising

At the right price a rail franchise should be a good source of cash: since operators own neither track nor rolling stock, they require little capital investment.

ECONOMIST: The battle over Britain��s busiest inter-city train route

Sir Moir wearily insists that many of the problems stem from under-investment by Network Rail, which owns the tracks, and points to his own firm's investment in new rolling stock.

ECONOMIST: The man who took the bus from Aberdeen to America