... CZQ-4000B,Design standard & basis1,Equipment design and manufacturing standards: the national standard GB3721-83 " ... 5,Electric control system6,Spraying, agitation, filtration and recycling system of magnetizing suspending liquid7,Longitudinal magnetization coil7. ... diameter 400mm.8,The human-machine interface control system 11,Automatic demagnetization systemAttenuation type automatic demagnetization. ...