tube well

同根派生

Appropriate quantity of heat exchange of unit length tube well should be chose according to edaphic characteristics.
因此应根据土壤特性，选择合适的单位长度管井换热量。
This paper recommend a kind of simple manual die to bend the thin-wall rectangular cross section steel tube well in forming process.
介绍了一种简单实用的手动弯曲模，可以较好地完成薄壁矩形截面钢管的弯曲成形工艺。
Thispaper solves the problem using teclmique of big tube well, steel protecting canister, umbrella model breast wall and so on.
大孔经人工挖孔扩底灌注遇地下水施工难度大,本工程采用大管井降水,钢护筒,伞模护壁等工艺和技术解决了这一难题。
The determination of diameter and length of tube well filter is always a problem not being completely solved for a long time in tube well engineering from theoretical and practical point of view.
长期以来,管井过滤器直径和长度确定一直是管井工程未完全解决的理论和实践课题,迄今,有关规定不同,存在学术见解分歧,也存在诸多值得讨论的问题。
I am well aware that this is a tough job.
我深知这是一件棘手的工作。