可采用多种钢轨廓形，使每种廓形与车轮均有一定数量的接触点，可以提高导向性能和总体的车辆运行质量，从而减少噪声和振动。
Use of a variety of rail profiles with a range of contact points improves steering and overall ride quality, and thereby reduces noise and vibration.
特别有效的是将钢轨的断面廓形打磨成满足系统要求的形状。
Rail profile grinding can be particularly effective if the applied profiles are tuned to the specific system requirements.
与之对应，直线段的钢轨通常打磨成与车轮有几点接触的形状，车轮与轨道之间是非共形接触，从而减少轮对不正常的摆动。
Tangent track, on the other hand, may be ground to several contact points to promote non-conformal contact and thus reduce wheelset hunting.
结果表明，设计的钢轨预防性打磨形面与钢轨原始形面的各项性能均相差不大，符合预期。
The results show that the design of preventive rail grinding profile is little difference with the original profile, in line with expectation.
系统采用三角形摄影测量原理，借助线型激光和高速数字像机获取钢轨断面轮廓信息；
The system utilizes the triangulation photogrammetry, and obtains rail profile with the help of line-type laser and high-speed digital camera.
因此，研究钢轨打磨形面就有很强的实际应用价值。
Therefore, the study of rail grinding profile will have a strong practical value.
铺轨时，“U”形弯环的环部被砸弯，压住钢轨的底脚，即可将轨枕与钢轨联结在一起。
During rail laying, the loop part of the U-shaped bent loop is knocked bent to hold down the foot of the rail and in this way, the sleeper and the rail are connected together.
铺轨时，“U”形弯环的环部被砸弯，压住钢轨的底脚，即可将轨枕与钢轨联结在一起。
During rail laying, the loop part of the U-shaped bent loop is knocked bent to hold down the foot of the rail and in this way, the sleeper and the rail are connected together.
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