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.
随着石墨颗粒含量从5%增加到20%，镁合金基复合材料的耐磨性得到明显的改善，磨损质量损失与摩擦系数都降低到较低水平。
On small friction coefficient runways, skidding wheels result in largely reduced brake efficiencies and possible loss of directional stability in rolling.
在小结合系数跑道下，机轮打滑严重，导致系统刹车效率降低，并很容易使飞机丧失滑跑方向稳定性。
The friction coefficient of amphiphobic surface in seawater is smaller than that in water while the wear loss of the former is bigger.
双疏表面在油介质中的摩擦系数和磨损量最小，在海水中的摩擦系数小于水，磨损量大于水。
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