WPC treatment could produce many fine pits on the metal surface, which can contain lubricant so that wearing and friction of the sliding part and noise can be reduced.

• WPC加工使其金属表面产生无数细小凹痕,能起到积存润滑油的作用,因而减小了滑动部分的磨损和摩擦,并可降低噪声。