这个区域有两个重要的物理现象：一个是范爱伦辐射带 (Van Allen Radiation Belts)，一个是环形电流 (ring current)。范爱伦辐射带的形成，显示此区的强磁 场为我们地球上生物抓住了许多有害的高能粒子辐射。
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伟肯的同步平行变极器专利设备在设备间将环形电流最小化。
The Vacon-patented method of synchronizing parallel inverter (Active Front-End) units minimizes the circulating current between the units.
振荡变压器通常是在环形铁氧体磁芯上绕线制成，实际上是一个电流互感器。
Oscillation transformer are usually made on the ring ferrite core coil winding, is actually a current transformer.
用一个收敛很快的级数构造了非圆截面、线性电流分布环形等离子体的磁流体平衡解。
The MHD equilibrium solutions of a toroidal plasma with non-circular cross-section and linear current distribution are written in terms of a fast convergent series.
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