The roof support structure had collapsed and the entire weight was bearing down on the ceiling.

屋顶的支架倒塌了，全部重量都压到了天花板上。

柯林斯例句

Pipe roof support is an assisted method of shallow tunneling.

管棚支护是浅埋暗挖法施工中的一种辅助工法.

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This paper analyzes in detail on the adaptability of each theory of suspension roof support.

详细分析了各种锚杆支护理论的适应情况.

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Roof Support elevation, the axis displacement and cross - deflection, the measurement made by the record.

屋架支座的标高 、 轴线位移、 跨 中挠度, 经测量做出记录.

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