... Model, Brand and Manufacturer1,Name Three-phase full-wave ac/dc fluorescent magnetic powder flaw detection machine2,Model CZQ-4000B ... with non-contact, no interference, no noise, operation simple, reliable performance, etc.E,Equipment main specifications1,Power supply 3 phase, ... dc,Timely set4,Longitudinal magnetizing current AC, 0--20000AT, RMS three-phase full-wave ac,Timely setDC, 0--20000AT, RMS ...