After being laid, cable should undergo DC voltage test.
电缆敷设安装后应经直流耐压试验。
Measuring DC voltage and current, the LED display, and display power.
测量直流电压电流，在数码管上显示，并且可显示功率。
DC voltage is always positive (or always negative), but it may increase and decrease.
交流电压总是正极(或总是负极)，它一样会增殖或减殖。
My next stop took me to the AC-DC thermal voltage and current lab.
我的下一站是参观AC - DC热电压和电流实验室。
This paper introduces the composition and function of DC. low voltage network intelligent management system.
文章介绍了直流低压网络智能化管理系统的组成和功能。
DC standard voltage source is a kind of metrology standard instrument with high accuracy.
直流标准电压源是一种高准确度的计量标准仪器。
交流电流源或电压源。
A new leak current model of high voltage DC leak detection is developed.
建立了填埋场渗漏检测高压直流电法漏洞电流模型。
Low voltage DC power is also provided for control power and emergency power.
低压直流电作控制电源和应急电源。
Safe; Low voltage dc 12V power supply , so it's very safe.
安全；采用低压直流12V供电电压，因此使用上非常安全。
Safe; Low voltage dc 12V power supply , so it's very safe.
安全；采用低压直流12V供电电压，因此使用上非常安全。
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