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