轨底 meaning in Chinese

flange of rail
rail base
rail bottom
rail chair
rail flange
rail foot

In this paper , the renovation of rail base slope at the curve track of guangzhou metro line 1 is introduced , the author explains the causes of the hurt within rail base slope , and discusses some practical solutions which are proved successful
摘要介绍了广州地铁l号线曲线内轨轨底坡的设置情况，简述了由于钢轨轨底坡设置不合理而引起的危害，并结合地铁的实际情况，提出了调整轨下垫板坡度的解决办法，取得了良好的实际效果。