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