For pipelines with a uniform gradient, safety ratio is an important index for evaluating the hydraulic safety of a system.
对于均匀坡度的管道系统，安全率是评价系统水力安全性的重要指标。
However, stress re-distribution would occur in the non-uniform structural stress introduced by quenching with a low stress gradient.
而淬火引入非均匀的结构应力且梯度较小，主要发生应力重分布。
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