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1·By the action of high roatry speed, excentric shaft connection intensifies the fatigue failure of drill tool.

为了达到较好的防斜目的，必须增大钻进时钻头的转速，在高转速的作用下，偏轴接头加剧了钻具先期疲劳失效。

2·This paper analyses the influence of excentric shaft connection on force case of drill tool, and discusses the causes of drill tool failure.

文中分析了使用偏轴接头对钻具各部分受力情况的影响及导致钻具失效的原因。

3·In this paper influence of geometric excentric ball track of rolling bearing of spindle of machine tool on machining accuracy of workpiece is discussed.

文章讨论了机床主轴滚动轴承滚道的几何偏心对工件加工精度的影响。

4·Based on the non-linear kinematic wave method, a technique using the four point, excentric, implicit, finite-difference numerical scheme to simulate the urban storm sewer system is introduced.

本文根据非线性运动波法理论，介绍了四点非中心隐式有限差分格式模拟城市雨水管网的技术。