FY-1U9K5三相交流电压表 FY-1P9K1三相有功功率表FY-1Q9K1三相无功功率表 FY-1F9K1频率表FY-1H9K1功率因数表FY-1D9K1功率因数角度表96X96方形数显表可同时显示三相电流或三相电压FY-1I9K4三相交流电流表 FY-1U9K4三相交流电压表FY-1I1X1交流电流表FY-2I1X1直流电流表 FY-1U1X1交流电压表 FY-2U1X1直流电压表FY-1I1X5三相电流表