管井降水井
pipe well for lower water
管井井点降水
Dewatering and drainage design by pipe well points
dewatering and drainage design by pipe well-points
水井、井水及废水
Wells and well water and waste water
冷却水管降温法
temperature reduction scheme of cooling water pipelines
冷却水管降温技术
temperature reduction technology of cooling water pipe
输水管管件
water conveying pressure pipe
降水井
de-watering well
dewatering well
precipitation well
water level lowering well
pumped well
drainage well
降水井施作
construction of precipitation well
矿井水水质评价
mine water quality assessment
联合降水井
joint water-level lowering well