钢轨轨底缺陷有三种：底伤、结疤和底裂缺陷。
Steel rail has 3 rail base defects: bottom defect, scab and bottom crack.
对于工况参数，主要分析了横移量、轴重和轨底约束对轮轨滚动接触应力场的影响。
The effects of case parameters on the distribution of elastic-plastic stress hi railhead are analyzed including lateral displacement, gross rail load on axle and constrained conditions of rail bottom.
采用数值仿真方法研究了不同车轮踏面外形、轮对内侧距、轨底坡和车速对踏面磨耗深度和磨耗分布的影响。
Numerical simulation was used to study the influence of profile shape, vehicle speed, wheel back distance and rail cant on the wear depth and wear distribution of wheel profile.
介绍了一种新型的底卸式箕斗卸载曲轨，并总结了固定卸载曲轨设计中需注意的几个问题。
The paper introduced a new type of dump track for bottom dumping skip, and some issues need to be noticed in design are summarized.
不含任何弯曲或扭曲轨、道岔、转辙器及制动轨，或有裂口或破底钢轨。
Free from bent and twisted rails, frog, switches, and guard rails, or rails with split rail.
路基就是上面铺着道渣，枕轨和钢轨的底基。
Road bed is the subgrade on which are laid the ballast, ties and rails.
路基就是上面铺着道渣，枕轨和钢轨的底基。
Road bed is the subgrade on which are laid the ballast, ties and rails.
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