... tube drainage 管道排水 tube well drainage 管井排水；竖井 underground drainage 地下排水 ...
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竖井排水管 chimney drain
管井排水
Pipe well drainage
以上为机器翻译结果，长、整句建议使用 人工翻译 。
阐述了管井井点排水的设计布置及井点钻孔质量、三滤质量、洗井质量、抽水连续性等关键工序的施工技术。
The design layout, key process of construction, such as well point drilling quality, filtrating quality, well washing quality, continuity of pumping were discussed.
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