... powder flaw detection machine for small and medium-sized parts A,Equipment Name, Model, Brand and Manufacturer1,Name Three-phase ... system of magnetizing suspending liquid7,Longitudinal magnetization coil7.1,A mobile magnetized coil,inner diameter 400mm.8,The human- ... holes show clear(10.67 mm away from the surface)7,Demagnetization way Ultralow frequency demagnetization8,Demagnetization effect ≤160A/m ...