第一边 meaning in Chinese

takeoff leg
upwind leg

The first boundary value of degenerate parabolic partial differential equation
退化抛物型方程的第一边值问题
The conservation law of the first boundary value problem of infiltration equation
渗流方程第一边值问题解的守恒律
The first boundary value problem of radical flow of the plane non - newtonian fluids
平面非牛顿流体径向流动的第一边值问题
First boundary value problemsfor nonlinear hyperbolic complex equations of second order
二阶非线性双曲复方程的第一边值问题
Chapter 3 introduces the main ideas of the probabilistic numerical method and applies it to the harmonic boundary value problem over bounded plane domains
第三章首先介绍概率数值方法总的思路，然后对平面有界区域上，调和方程的第一边值问题提出了概率数值方法。