... inner diameter 400mm.8,The human-machine interface control system 11,Automatic demagnetization systemAttenuation type automatic demagnetization ... periphery of the circuitFor Solid-state relay controlled for phase control,promise DiaoLiu,with non-contact, no interference, ... the surface)7,Demagnetization way Ultralow frequency demagnetization8,Demagnetization effect ≤160A/m(0.2mT9,Working way: automatic ...