A rolling bearing is a ready-to-mount machine element.
滚动轴承是一个即装即用的机器元件。
A machine element is, therefore, a single unit designed to perform a specific function and capable of combining with other elements.
因此，机械零件只是设计来完成某个特定功能并能与其它零件相结合的一个单元。
In Mechanical Engineering, conducting research on the roughness of surfaces of the machine element also is profoundly practically significant.
在机械工程中，对机械零件加工表面的这种凹凸不平性开展研究同样具有重要的实践意义。
In Mechanical Engineering, conducting research on the roughness of surfaces of the machine element also is profoundly practically significant.
在机械工程中，对机械零件加工表面的这种凹凸不平性开展研究同样具有重要的实践意义。
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