随着与地下水有关的工程活动的逐步复杂化，任意直角坐标系下潜水渗流问题日渐多见。
As engineering activities related to groundwater are getting more and more complicated, seepage problems in arbitrary rectangular coordinates system can be often met.
南希：直角坐标系可以在区域内设任意一点。
在直角坐标系中分别表示出了均匀带电椭圆形环在中心轴线上任意位置处的电势及电场。
In the rectangular coordinate system, we express the electric field intensity and different position electric field energy of the elliptical ring with positive electric charge in the central axis.
在直角坐标系中分别表示出了均匀带电椭圆形环在中心轴线上任意位置处的电势及电场。
The new solution of an electric potential and an electric field distributions for a charged electric conduct ring.
在直角坐标系中分别表示出了均匀带电椭圆形环在中心轴线上任意位置处的电势及电场。
The new solution of an electric potential and an electric field distributions for a charged electric conduct ring.
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