弱直流
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weak DC signal 微弱直流信号
weak steady DC EFs 低压稳恒直流电场
weak signal dc amplifier 微弱信号放大器
dc weak current sensor 直流微电流传感器
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The measurement of weak DC signal is the key technique for on-line DC monitoring system with XLPE power cables to improve its measurement accuracy.
为了提高XLPE电缆直流法在线监测的测量精度，需对微弱直流信号进行测量。
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