{HEAD ~ an inflator housing} having two walls, an inner wall and an outer wall, the inner and outer walls forming {TAIL ~ a combustion chamber} 
{ HEAD ~ an inflator housing } having two walls , an inner wall and an outer wall , the inner and outer walls forming { TAIL ~ a combustion chamber }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL