研究的主要对象是：半金属摩擦片的湿法制备技术及其摩擦学性能的影响。
The main object of this study is half-metal friction slices of automotive for technique and its influence on the performance of the tribological.
但是犯人们总能找到办法弄到。现在他们用牙线慢慢钜金属，抹上牙粉增加摩擦力。
He says they actually use dental floss to slowly saw away at the metal, adding tooth powder to increase the friction.
磨损失效系指表面之间的相对滑动摩擦导致其工作表面金属不断磨损而产生的失效。
Wear failure refers to the relative sliding friction between the surfaces causes the surface of the metal continue to wear their work arising from the failure.
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