信号地线信号接地
Signal ground cable A signal is grounded
以上为机器翻译结果，长、整句建议使用 人工翻译 。
接地信号源的电压信号以系统地线作为参考点，比如建筑物或大地。
A grounded source is one in which the voltage signals are referenced to a system ground, such as earth or building ground.
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