{TAIL ~ The porous substrate} is impregnated with {HEAD ~ a polymeric material} capable of bonding to the insulation of the conductors 
{ TAIL ~ The porous substrate } is impregnated with { HEAD ~ a polymeric material } capable of bonding to the insulation of the conductors
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH