近水面水翼
hydrofoil near free surface
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
层间滞水
water stagnating between the strata
地下水滞留时间
Residence Time of Groundwater
冻结滞水
Frogen stagnant water
frozen perched ground water
frozen stagnant water