CRH5A型动车组接地摩擦盘摩擦表面允许存在深度不大于( )的划痕,划痕深度超过( )时更换摩擦盘。
A.0.5mm,0.5mm
B.0.8mm,0.8mm
C.1mm,1mm
D.1.5mm,1.5mm
正确答案是A