?轨头微细波纹

... 轨头垂直劈裂 vertical split of rail head 轨头微细波纹 detail fracture of rail head 轨端崩裂 rail end breakage ...

?轨头微细裂纹

... 轨头水平劈裂 horizontal split of rail head 轨头微细裂纹 detail fracture of rail head 轨头压溃 crushing of rail head ...