{HEAD ~ Various alternative embodiments} are used to improve the efficiency of the head by channelling the magnetic flux outside {TAIL ~ the gap} 
{ HEAD ~ Various alternative embodiments } are used to improve the efficiency of the head by channelling the magnetic flux outside { TAIL ~ the gap }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL