在试验数据的基础上，根据统计学原理，拟合出完整的C - R - S - N曲线，并获得各种可靠度下的弯曲疲劳曲线，从而为国产材料齿轮设计提供了必要的基础数据。
On the basis of test count, the complete C-R-S-N curve is worked out according to the principle of statistics. so as to provide basic data for gear design.
运用可靠性方法，基于概率分析设计了单轴和双轴疲劳可靠性试验，得到了套管柱的单轴和双轴概率疲劳特性，推导出套管钻井的P — S — N 曲线方程。
The reliability tests both the axial fatigue and the biaxial fatigue of casing strings were designed by means of examination and numerical simulation, and the P-S-N curves were obtained.
按照脸部曲线采用人体工程学设计，长时间佩戴无疲劳感。
Face curve in accordance with ergonomic design, long wear without fatigue.
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