电场由电势方程近似反映，只考虑周向自感应磁场。
The electric field was simulated by electric potential equation.
当待加工部件在设备里就位后，线圈在其中产生感应磁场。
When the component to be worked is placed next to such a machine, the coil induces in it a corresponding field.
长期以来，人们主要通过物理模型实验来获取水下航行器的感应磁场。
For long, people mostly get the induced magnetic field of under-water aircrafts through the experiment of physical model.
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