PDM-820***,PDM-820AC综合电力监测仪PDM-820DP,PDM-820QC综合电力监测仪PDM-820EH综合电力监测仪PDM-803P,PDM-803DP多功能电力仪表PDM-803AC,PDM-803AC-F72多功能电力仪表PDM-803A,PDM-803A-F72三相数显表)