危险危害因素
dangerous and hazardous factor
电网电压不对称跌落
asymmetric grid voltage drop
电压跌落
voltage dip
voltage sag
Voltage drop
voltage dips
voltage sap
voltage collapse
SAGS
voltage-dip
voltage slop
voltage-sag
cluster analysis for variables
Voltage sags
voltage sage
voltage dip sag
Voltage decline