{HEAD ~ The case} is formed of rigid material, is hermetically connected to an opening of the airbag and is provided with {TAIL ~ the air discharge port} 
is provided with
{ HEAD ~ The case } is formed of rigid material , is hermetically connected to an opening of the airbag and is provided with { TAIL ~ the air discharge port }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL