{HEAD ~ The motor} includes {TAIL ~ a buried magnet system} and a stator operable to produce an alternating magnetic field exerting alternating axial forces on the buried magnet system that has a self centering force and a required stiffness to reciprocate at a frequency near an alternating current supply frequency 
includes
{ HEAD ~ The motor } includes { TAIL ~ a buried magnet system } and a stator operable to produce an alternating magnetic field exerting alternating axial forces on the buried magnet system that has a self centering force and a required stiffness to reciprocate at a frequency near an alternating current supply frequency
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH