{HEAD ~ a surface length} of each of {TAIL ~ the stator teeth} is greater than a sum of a stroke length of the motor and an axial thickness of one of the magnets in the buried magnet system, and 
{ HEAD ~ a surface length } of each of { TAIL ~ the stator teeth } is greater than a sum of a stroke length of the motor and an axial thickness of one of the magnets in the buried magnet system , and
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL 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