当发生接触时，表面通常通过接触面传播剪力和法向力。
When surfaces are in contact they usually transmit shear as well as normal forces across their interface.
拆下热分散磨片，清洗转子的接触面，检查确信其表面没有损伤。
Dismantle the dispersing discs and clean the contact surfaces on the rotor and gable. Make sure that there are no damages to these surfaces.
岩样粗糙外表面与水银接触面之间的空腔体积是产生麻皮效应的根源。
It is found that the pore volume between the surfaces of coarse sample and the mercury is the origin of pockmarks -effect.
实验：两个项目具有相同的压力擦，先用干燥的表面，随后与接触面之间的一些水珠-的电阻会觉得有所不同！
Experiment: Rub two items with identical pressure, first with dry surfaces, afterwards with some drops of water between the contact surfaces - the resistance will feel different!
实验：两个项目具有相同的压力擦，先用干燥的表面，随后与接触面之间的一些水珠-的电阻会觉得有所不同！
Experiment: Rub two items with identical pressure, first with dry surfaces, afterwards with some drops of water between the contact surfaces - the resistance will feel different!
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