1·It is important to understand the tribological characteristics of rare earth materials and the role of rare earth element.
了解和掌握含稀土材料的摩擦学特性及稀土元素在其中的作用机制具有重要的意义。
2·Contact problem is an important portion in the tribological problem analysis, because the non linearity of contact problem makes the engineering analysis and research relatively difficult.
接触问题是摩擦学问题分析中重要的一部分，由于接触问题的非线性，使得工程分析研究较为困难。
3·Tribological problems in aluminum rolling affect directly quality, output, power consumption and cost of products, and so they have had great attention.
铝材轧制中的摩擦学问题，直接影响到产品质量、产量、能耗和成本，因此，当前已成为人们十分关心的问题。
4·The tribological characteristics of cast iron under dry sliding condition was systematically investigated.
系统地研究了铸铁材料在干滑动摩擦条件下的摩擦学特性。
5·Abstract: The tribological characteristics of cast iron under dry sliding condition was systematically investigated.
文摘：系统地研究了铸铁材料在干滑动摩擦条件下的摩擦学特性。