TUnnel headrace引水隧道
Headrace tunnel引水隧道;进水隧洞
headrace tunnels引水隧洞群
headrace channel导水沟;引水渠
headrace system引水渠系统
Headrace structures引水系统建筑物
headrace conduit上游渠道;进水渠
Headrace works引水工程
headrace surge tank上游调压井
N（名词） a channel that carries water to a water wheel, turbine, etc (把水引到水轮、涡轮等的、)导水管道 → compare tailrace