voltagedropn.压降voltagen.电压voltage stabilizer tube稳压管voltage-dip generator电压跌落发生器voltage effective value[电] 电压有效值voltage stability index电压稳定指标voltage current adapter电压电流适配器voltage holding circuit稳压电路voltage change interval电压变化间隔voltage distortion rate电压畸变率voltage increase system升压系统voltage lifting circuit电压提升电路