速度: velocity; speed; blast; bat面积: area法: law速度面: velocity surface面积法: area method; area rule; method of areas; method of determining yield by area; organization by area; planimetry光线速度面: ray surface; ray velocity surface; rays-velocity surface零速度面: surface of zero velocity; zero velocity surface; zero-velocity surface百吩面积法: percentage area method比降面积法: slope area method; slope-area method变面积法: variable-area method测面积法: planimetric method; planimetricmethod; planimetry此降面积法: slope area method等面积法则: equal-area criterion地表面积法: specific surface area method端面积法: end area method方格面积法: area quadrat method分区面积法: zone area method回声面积法: echo area method可变面积法: variable-area methods力矩面积法: area moment method; moment area method流速面积法: velocity area method面积法分析: area analysis面积法则: area rule挠矩面积法: moment area method求面积法: area method; quadrature