The superior properties of quenched rail have prompted its extensive use on operating railway tracks.

淬火钢轨由于其优良的使用性能，在铁路运营线路上使用得越来越多。

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Research purposes: the purpose is to sum up the experience of construction supervision for speed-raise project by electrification on operating railway line for reference to similar work.

研究目的总结铁路运营线电气化提速工程施工监理的体会，以供参考。

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Only after getting the contours of wheels and rail, and combining the two together, the effect of geometric contact conditions on the running performance of operating railway cars can be obtained.

只有掌握了车轮和轨道的轮廓型面，并将两者相结合，才可能掌握几何接触状况对铁路运营车辆的运行性能所产生的影响。

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The costs of maintaining and operating the railway in the 10-year period to 2014 have come down by 50%.

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Sir Richard said that if reviewing the decision meant the December deadline had to be postponed, his company and Stagecoach would be willing to continue operating the railway lines while donating any profits to charity.

BBC: Virgin Trains offers to run West Coast 'for free'

Sulabh also has begun operating sanitation facilities at railway stations and ports and may take over maintaining lavatories on trains.

CNN: New toilets, new lives