The significance of stress corrosion test for rail steel is demonstrated.

本文首先阐述了研究轨钢应力腐蚀的意义。

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And by significance test, we judge whether the elasticity change truly turned out.

通过显著性检验，判断弹性改变是否发生。

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And by significance test, we judge whether the elasticity change truly turned out.

通过显著性检验，判断弹性改变是否发生。

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