... requirements in Standard JB/T8290-1998.C,Inspection areas Can meet the 300mm in diameter less than, length is ... customer's requirements2,magnetizing current current can be set in advance,Digital display, magnetization time can timely set.3,Circular magnetizing current AC, ... -phase full-wave dc,Timely set5,Circular and longitudinal can switch6,Sensitivity6.1,Sensitivity:Clear indications on test piece ...