如果屏蔽和测量仪器之间存在一个交流电势差，则可能有电容性电流通过测量电路，增大干扰。
If there is an ac potential difference between the shield and the measuring instrument, there may be capacitive currents flowing through the measuring circuit that will add interference.
直流回路受到交流电压干扰，是控制回路中容易产生的现象。
It is common for the direct current circuit to be interfered by alternating current voltage.
综述交流电力线路对埋地管道交流干扰的危害，提出防止危害的几条措施。
The paper summarizes the effect of AC system on underground pipelines. Some measures on how to avoid its interference are put forward.
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