When the permanent magnet is thermally demagnetized, {TAIL ~ the thermosetting resin layer} is hardened at {HEAD ~ the same time} 
When the permanent magnet is thermally demagnetized , { TAIL ~ the thermosetting resin layer } is hardened at { HEAD ~ the same time }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD