The south pole on tooth 1 is allowed to decay, the diminution occurring at a rate depending on {HEAD ~ the hysteresis} of {TAIL ~ the rotor material} 
of
The south pole on tooth 1 is allowed to decay , the diminution occurring at a rate depending on { HEAD ~ the hysteresis } of { TAIL ~ the rotor material }
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 REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL