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 drop
voltage dip
Voltage sags
voltage sag
Voltage decline
voltage sage
cluster analysis for variables
voltage slop
voltage collapse
voltage sap
voltage dips
voltage dip sag
SAGS
voltage-sag
voltage-dip