drainage well meaning in Chinese

排水井
污水井
泄水井

Construction technology of big diameter drainage well of group rock
基岩大口径排水井成井技术
( 2 ) the treat of drainage wells and drainage curtains is a key point of seepage control research . drainage holes ( curtains ) must be simulated exactly because there are a large amount of drainage wells ( curtains ) that are of great effect , which requires high technique demands for mesh partition and capacity of computer . the question is extremely complicated
( 2 )地下厂房洞室群的排水孔排水幕的处理一直是渗控研究的重点，由于排水孔(幕)数量众多，渗控作用大，须尽可能精确模拟，这对网格划分以及计算机的容量都提出极高的技术要求，问题极为复杂。