... two-dimensional working section 二维工作段 working section area 试验段横截面面积 working section length 试验段长度 ...
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wind-tunnel working section area 风洞试验段截面积
working section area
工作剖面面积
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Larger tunnel section brings larger exposed area and higher risks when shield departs from the working shaft, so the stability of reinforced soil in this stage is the new challenge for the work.
隧道断面越大，封门拆除时加固土体所暴露的面积也越大，施工风险也就越高。
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