strengthening steel crane girder
strengthening steel crane girder
加固钢吊车梁
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Finally, it presents some advice and Suggestions for the repairing and strengthening method of fatigue crack of upper part of steel crane-girder in the high-frequency.
最后就重级工作制钢吊车梁上部区域出现疲劳裂缝的修复与加固方案提出了一些意见和建议。
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