In order to assure results correctness the requirement for system is that frictionwear of metal pairs must be a little, even omitted.
测量系统要求金属配副磨损量应很小，甚至可以忽略，以确保结果的准确性。
2
No movement mechanism frictionwear, the mechanical efficiency high, this is type compressor vortex than other air compressor greatly energy saving main reason.
无运动机构的磨擦磨损，机械效率高，这是涡旋式压缩机比其它空气压缩机大大节能的主要原因。
3
With graphite particle content increasing from 5% to 20%, wear weight-loss and friction coefficient of the composites are obviously declined, greatly improving wear resistance of the composites.