Either of {HEAD ~ the rotor} or stator members is formed of {TAIL ~ groups} of electromagnet pole pairs, the groups substantially equidistantly distributed along the angular extent of the annular ring, each of the groups comprising magnetic material magnetically isolated and separated from the other groups 
is formed of
Either of { HEAD ~ the rotor } or stator members is formed of { TAIL ~ groups } of electromagnet pole pairs , the groups substantially equidistantly distributed along the angular extent of the annular ring , each of the groups comprising magnetic material magnetically isolated and separated from the other groups
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH