An airbag is stored in a folded state in {HEAD ~ the airbag housing} so that {TAIL ~ the weakened portion} is broken upon inflation 
An airbag is stored in a folded state in { HEAD ~ the airbag housing } so that { TAIL ~ the weakened portion } is broken upon inflation
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH