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世事难料

新虫 (正式写手)

[求助] 求助,文献里面有几个词不知道该如何翻译。。。

1.In the case of iron pin in abrasion against steel plates,as the carbon petcentage in the plate increased,the friction coefficient decreased and the wear mechanisms transitioned from macro-asperity removal to yielding wear.      从macro到wear该怎么翻译
    2. two  principle modes of adheseve wear can be identified  in this study as asperity removal and junction growth.For the junction growth,the real area of contact grows and the friction coefficient also increases steadily under the constant  normal load.The growth of contact area results in powdery wear particle with smaller friction coefficient .  
    这段里面的junction growth 和asperity removal 如何翻译
   多谢大家了

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