有了这个选项，用户可以很容易地改变电源输出的极性。
有了这个选项，电源包括两个高压输出，并附带以下配件:
单独的插头用于将一个高压输出直接连接到地面。然后可以将高压电缆连接到另一个高压输出。
正极性：负输出用单独插头接地:
负极性：正输出用单独插头接地:
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