... coefficient of friction 摩擦系数 coefficient of hardness 硬度系数 coefficient of heat conduction 传热系数 ...
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hardness coefficient of rock 岩石硬度系数
This surface has extreme hardness (60 RC. ), excellent wear and corrosion resistance, and low coefficient of friction.
这表面有极高的硬度（60局。），耐磨性和耐腐蚀性，低摩擦系数。
Moreover, the variation law of mold surface hardness and interface heat transfer coefficient were studied.
另外，研究了消失模铸造法铸型表面硬度、界面换热系数的变化规律。
It shows that the composites' tensile strength and elongation decrease while the hardness and friction coefficient increase with the addition content of graphite.
结果表明，随着石墨添加量的增加，复合材料的抗拉强度和伸长率逐渐下降，硬度逐渐上升，摩擦系数逐渐变大。
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