So, it is the new method of researching welded structure fatigue damage process.

因此，它是一种研究焊接结构疲劳损伤过程的新途径。

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Fatigue failure is a common kind of mechanical parts and structure damage.

疲劳破坏是机械零件和结构的常见的失效形式。

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Fatigue failure is a common kind of mechanical parts and structure damage.

疲劳破坏是机械零件和结构的常见的失效形式。

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