... the national standard GB3721-83 "magnetic powder flaw detection machine.2,This equipment should meet all the magnetic particle inspection ... mobile magnetized coil,inner diameter 400mm.8,The human-machine interface control system 11,Automatic demagnetization systemAttenuation type automatic ... effect ≤160A/m(0.2mT9,Working way: automatic and manual 10,Part length capacity 0-3000 mm11,Magnetic coil inner ...