参考地，通常是指潜在的参考端，有时被称为回路或公用信号。
Reference ground, sometimes called a return path or signal common, is usually the reference potential of interest.
数据传输装置基于传真机的原理，利用公用电话网络，实现数据信号的远程传输。
The data-transmitting agency based on the principle of fax realizes long-distance data transmitting by the public phone net.
通讯采用直流电源载波方法，信号线与电源线公用，不仅降低了布线成本，而且提高了系统可靠性。
Using the DC power carrier technology, the signal was modulated into the power wire, which can not only reduce the wiring cost, but also improve the system reliability.
本文分析了公用通信网中非话音信号传输的特点，提出并实现了万门话路非话信号检测系统的研制方案。
The features of non-voice signals on public communication nets are analysed and an approach to distinguish such signals is introduced in this paper.
三台航空静止变流器模块均为电压、电流双环控制，通过公用电压调节器稳定并联系统的输出电压及频率，同时产生统一的模块电流给定信号。
Each module is controlled by voltage current two closed loops. The common voltage loop controls system output voltage & frequency, and generates a common reference current signal.
每台航空静止变流器模块均为电压、电流双环控制，通过公用电压调节器稳定并联系统的输出电压及频率，同时产生统一的模块电流给定信号。
Each module is controlled by voltage-current two closed-loops. The common voltage loop controls system output voltage & frequency, and generates a common reference current signal.
信号线与电源线公用。由此，不仅降低了布线成本，而且提高了系统可靠性。
Using the DC power carrier technology, the signal is modulated into the power wire, which can reduce the wiring cost and improve the system reliability.
信号线与电源线公用。由此，不仅降低了布线成本，而且提高了系统可靠性。
Using the DC power carrier technology, the signal is modulated into the power wire, which can reduce the wiring cost and improve the system reliability.
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