CZQ-4000 Three-phase full-wave ac/dc fluorescent magnetic powder flaw detection machine for small and medium- ... Name, Model, Brand and Manufacturer1,Name Three-phase full-wave ac/dc fluorescent magnetic powder flaw detection machine2,Model CZQ-4000B,Design ... setDC, 0 --- 4000A, RMS three-phase full-wave dc,Timely set4,Longitudinal magnetizing current AC, 0--20000AT, RMS three-phase full-wave ...