... CZQ-4000 Three-phase full-wave ac/dc fluorescent magnetic powder flaw detection machine ... Brand and Manufacturer1,Name Three-phase full-wave ac/dc fluorescent magnetic powder flaw detection machine2,Model CZQ- ... A #2.6.2,Dc sensitivity JB/T6066 according to regulations,adopts B shape standard test blocks, ... set 3400 A dc current,Try piece of ...