That is, {HEAD ~ the magnet system} has {TAIL ~ a self centering force} as it moves through its entire reciprocating cycle, as measured from a center point 
has
That is , { HEAD ~ the magnet system } has { TAIL ~ a self centering force } as it moves through its entire reciprocating cycle , as measured from a center point
OTH OTH OTH HEAD 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