{TAIL ~ The conductor} can be surrounded by {HEAD ~ additional layers} of polymeric material as long as the outer layer comprises the first polymeric material 
{ TAIL ~ The conductor } can be surrounded by { HEAD ~ additional layers } of polymeric material as long as the outer layer comprises the first polymeric material
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH