The seventh chapter is the case analyses on the already-canceled Peasant Schools.
第七章是对已被撤销的农校的个案分析。
This paper briefly introduces basic method of fault tree analysis, discusses in detail the method of fault tree analysis based on possibility distribution, and analyses a case.
介绍了事故树分析的基本思路，讨论了基于可能性分布的模糊事故树分析法，并结合实例作了具体分析。
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。
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