Noun:

1. a waterway that feeds water to a mill or water wheel or turbine

headcap书脊护舌headn.头部；头脑；顶端；领袖；硬币的正面v.前进；为首；朝向adj.首要的；前面的head wheel drive磁头鼓驱动head-to-foot[计] 顶到底headless package无边盘卷装head deformation头部变形区head pivot point头的转动中心head gap azimuth磁头间隙方位角head enterprises龙头企业head space gases液上气体head disk system磁头磁盘系统head impact test头部冲击试验

headrace tunnel引水隧道

headrace bay前池