This layer is coated with an insulating material which has, in a reading zone, {HEAD ~ detection elements} made from {TAIL ~ a magneto resistive material} 
made from
This layer is coated with an insulating material which has , in a reading zone , { HEAD ~ detection elements } made from { TAIL ~ a magneto resistive material }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL