近水面水翼
hydrofoil near free surface
坡面水土流失
soil and water loss on slope surface
坡面水系工程
water system engineering works built on slopes
水面/水下监视协调官
surface/subsurface surveillance soordinator
SSSC
水面水力特征
hydrodynamic feature of surface
梯形断面水面线
water surface profiles of trapezoid