Based on reliability theory, the calculation formula of specified life of linear rolling guide system is deduced. The result is of important engineering value.

根据可靠性原理，导出了滚动直线导轨系统额定寿命的计算方法，具有重要的工程应用价值。

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Based on reliability theory, a basic maths model of calculating the reliability of drainage pipe line is recommended for factual need of drainage pipe line design.

根据排水管网设计的实际需要，以可靠性分析理论为依据，提出可以用于排水管网可靠性计算的基础数学模型。

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Based on reliability theory, combined with finite element method for structure optimization, the lightweight design for the lower arm of a suspension is conducted.

基于可靠性理论，结合有限元结构优化方法进行某悬架下摆臂的轻量化设计。

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