considerable structural damage
严重的结构损坏
以上为机器翻译结果，长、整句建议使用 人工翻译 。
In this paper, some analysis and study have been done about the accidents, I found that a considerable portion of these accidents are due to structural damage caused by fatigue.
本文对多起塔式起重机事故进行了分析研究，发现这些事故中有相当一部分是由于结构的疲劳破坏引起的。
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