1) emergency source frequency monitoring card
应急电源频率监控卡
2) emergency source frequency monitoring
应急电源频率监控
3) emergency source voltage monitoring card
应急电源电压监控卡
4) emergency source undervoltage pc card
应急电源低电压程控卡
5) emergency source voltage pc card
应急电源电压程控卡
6) emergency source voltage monitoring
应急电源电压监控
补充资料：频率计量(见时间频率计量)
频率计量(见时间频率计量)
frequency metrology: see time and frequency metrology
口n IQ liliang顷率频率计皿(f比quency metrolo盯) 计t。见时闰
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条