With such advantages as no friction, no wear, no lubrication, no pollution, long lifetime, etc, PMB can be used in many special occasions as high speed, ultra-high speed, vacuum, and so on.

• 具有无摩擦、无磨损、无需润滑、无污染及使用寿命长等优点，适用于各种高速超高速、真空等特殊环境场合。