The supply electricity using permanent current source for the DC potentiometer can simplify working processes and raise working efficiency.
用恒流源为直流电位差计供电可以简化操作过程，提高工作效率。
The supply electricity using permanent current source for the DC potentiometer can simplify working processes and raise working efficiency.
用恒流源为直流电位差计供电可以简化操作过程，提高工作效率。
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