... agitation, filtration and recycling system of magnetizing suspending liquid7,Longitudinal magnetization coil7.1,A mobile magnetized coil,inner diameter ... --- 4000A, RMS three-phase full-wave dc,Timely set4,Longitudinal magnetizing current AC, 0--20000AT, RMS three-phase full ... three-phase full-wave dc,Timely set5,Circular and longitudinal can switch6,Sensitivity6.1,Sensitivity:Clear indications on test ...