... heat, long usedcompetitive price 3.Type 250D/300D Bi-Purpose electric machine meets two kinds of application,i.e.D.C ... ), whit rated voltage 220V,single phase,50Hz frequency,suitable for lighting,electric fan,other do-mestic uses and so on.This machine ... engine,especially suitable for operating in the area of on electric power source.Type 250D/300D4.When applied as a D ...