An on vehicle airbag apparatus includes {TAIL ~ an airbag housing} having {HEAD ~ a weakened portion}, which is breakable 
An on vehicle airbag apparatus includes { TAIL ~ an airbag housing } having { HEAD ~ a weakened portion } , which is breakable
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH