At the same time, HPF moderates the top-of-rail friction coefficient, reducing the high levels encountered during dry weather, and improving traction under otherwise low friction conditions.

• 与此同时，HPF高效抗摩擦剂调节了轨顶面的粘着系数，减少了在干燥天气时的轮轨碰撞，在低粘着的条件下可以提高牵引能力。