水平面以上天线高度
height calculation above sea level
前体水线面面积系数
forebody waterplane coefficient
水翼小水线面面积船
hydrofoil small waterplane area ship
梯形断面水面线
water surface profiles of trapezoid
等高线、高程点赋值
assignment for elevation point and contours
高水高排
high water level and high-speed drainage