The system has good performance of variable polarity output, they also have a hardware circuit structure is simple, low cost, the system efficiency.
该系统在具有良好的变极性输出性能的同时，又具有硬件电路结构简单、成本低、系统效率高等优点。
The system has good performance of variable polarity output, they also have a hardware circuit structure is simple, low cost, the system efficiency.
该系统在具有良好的变极性输出性能的同时，又具有硬件电路结构简单、成本低、系统效率高等优点。
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