pit shaft freezing 井筒冻结
pit shaft equipment 井筒装备
refitting pit shaft 井筒改装
prolonging pit shaft 井筒延深
pit shaft antifreeze 井筒防冻
extra-deep pit shaft 超深井筒
protecting pillar in pit shaft 井筒保护煤柱
The underground flood is one of the biggest technological difficult problems while constructing the pit shaft tunnels.
地下水患是井筒掘进施工中最大的技术难题之一。
参考来源 - 铧子石膏矿井筒突水综合治理的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The original introduced some respects of the quality control in shaft pit shaft building.
本文介绍在立井井筒施工中质量控制方面的一些情况。
For pit shaft and pipelines 'heat loss, it suggests using geothermal water for the pit shaft and pipeline's insulation.
对于地热水井筒和输送管线的热损失，建议利用地热水进行井筒和管线的保温措施。
This text introduced the practice method of the box permanent steel petroleum derrick shaft sinking in the construction of vertical shaft pit shaft.
在立井井筒建设中，我们在原设计的基础上，对箱形永久钢井架凿井的实际方法作了改进。
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