tailrace tunnel meaning in English

尾水洞
尾水隧洞

Construction of long tailrace tunnel bifurcation concrete structure for dachaoshan hydropower station
大朝山水电站长尾水隧洞岔管混凝土施工
The calculated result from an example shows that the stable sectional area reduces with the increase of working head , or the decrease of the tailrace tunnel length
计算结果表明，尾水调压室断面面积随水轮机工作水头的增大或尾水洞长度的缩短而减小。