While this contaminant layer is responsible for varying friction values, it plays a beneficial role by separating the wheel and rail surfaces, usually decreasing wear.
轮轨表面的污染层也会影响粘着系数的变化，它避免了轮轨表面直接接触，有利于减少磨损。
2
The influences of friction coefficient of the switch slide baseplate on the actuating force, and the minimum distance between the rail and the switch rail have been analyzed.