Mean sea level is an equipotential surface with respect to gravity.

平均海平面就是一个关于重力的等位面。

The distributions of equipotential surface in electrostatic deflection system under different cases are given in this paper.

本文给出了不同情况下静电偏转系统中的等位面分布。

Transition to the three-dimensional space, then we obtain the equation of equipotential surface families of charged conductor with surface of hyperboloid of one sheet.

利用保角变换，首先在二维平面得到双曲线型的等位线簇方程，然后过渡到三维空间，从而得到表面为单叶双曲面（两实半轴相等）的带电导体的等位面簇方程。

The surface itself is an equipotential.

表面本身是一等位面。

Investigation of seismically resistant characteristics of rocks in the Baikal region together with literary data and unified theory allowed one to evaluate the equipotential source surface.

结合在贝加尔地区岩石抗震特性调查与文字资料和统一理论，使人们可对震源等势面进行评估。