功率因数计 meaning in English
pfm
phase meter
power factor meter
power-factor meter
Examples
- Direct acting indicating analogue electrical measuring instruments and their accessories . part 5 : special requirements for phase meters , power factor meters and synchronoscopes
直接作用的指示用模拟电气测量仪器及其附件.第5部分:相位计功率因数计和同步示波器的特殊要求