Chapter one is the analysis of causation.
第一章为因果关系理论分析。
The paper makes mathematical analysis on the causation of error in profile machining, and resolves the problem using altering the method in numerical calculation.
本文对这种加工误差产生的原因进行了数学分析，通过更改数值计算的方法解决这个问题。
According to the causation analysis of vehicle bumping at the bridge-head, the author puts forward his own opinion and its prevention measurements in allusion to these causations.
本文作者通过对桥头跳车产生的原因进行分析，提出自己的看法，并针对原因提出防治措施。
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