tailrace tunnel尾水洞
tailrace junction尾水岔管
tailrace e放水渠
tailrace debris尾水堆渣
Tailrace river尾水河道
tailrace structures尾水建筑物
tailrace outlet尾水出口
tailrace dredging河道清淤
tailrace riverbed尾水河道
N（名词） a channel that carries water away from a water wheel, turbine, etc 放水渠 → compare headrace