涂层为特氟龙涂层，即聚四氟乙烯涂层，涂层可以减少摩擦力，使气缸壁更加耐磨。
The coating layer is a Telfon coating layer, namely a polytetrafluoroethylene coating layer, the coating layer can reduce frictional force, which leads the cylinder wall to be more wear-resisting.
如果滚动摩擦代替了滑动摩擦，摩擦力将大大减少。
If rolling friction is substituted for sliding friction, the friction will be considerably reduced.
如果滚动摩擦代替了滑动摩擦，摩擦力将大大减少。
The rolling friction is substituted for sliding friction results in a considerable reduction in friction.
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