1、
According to the result of fatigue count, it was one high stress raiser for thread root.
对接头进行疲劳计算，得出螺纹根底是一个高的应力集中源。
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2、
Such a discontinuity or stress raiser causes a local increase of stress.
此类的不连续性或应力集中源会引起应力的局部增加.
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