Further, if one or {TAIL ~ both} of the barrier layers includes {HEAD ~ a metal foil}, induction heating can be employed to seal the barrier layers together 
Further , if one or { TAIL ~ both } of the barrier layers includes { HEAD ~ a metal foil } , induction heating can be employed to seal the barrier layers together
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH