The superior properties of quenched rail have prompted its extensive use on operatingrailway 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。
2
Research purposes: the purpose is to sum up the experience of construction supervision for speed-raise project by electrification on operatingrailway 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。
3
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 operatingrailway cars can be obtained.