Steel rail has 3 rail base defects: bottom defect, scab and bottom crack.

钢轨轨底缺陷有三种：底伤、结疤和底裂缺陷。

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This thesis recommends the design for principle that the distance measurement system of rail base on distance laser sensor.

介绍了基于激光测距传感器的铁轨测距系统的设计原理。

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The rail is an exclusive line for coal transport between Urumqi and Fukang, a major coal production base in Xinjiang.

这条铁路是乌鲁木齐和富康市之间一条运煤的专线。富康市是新疆一个重要的煤炭生产基地。

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Mr Patel had been managing controls for junctions and level crossings for a very large area from a Network Rail base in Peterborough on 3 October, 2011.

BBC: Network Rail signalman praised for averting Sandy crash

The sooner other countries follow their example and base transport taxation on total costs, the sooner rail freight will be able to compete.

ECONOMIST: A better way to fly