This invention is performed to obtain the characteristics required for the magnetic roller, namely the stability of a position for {HEAD ~ the magnetic poles} by increasing {TAIL ~ the magnetic characteristics} and improving the permeance 
This invention is performed to obtain the characteristics required for the magnetic roller , namely the stability of a position for { HEAD ~ the magnetic poles } by increasing { TAIL ~ the magnetic characteristics } and improving the permeance
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH