The hollow, vinyl plastic ribs are inflated with air through {TAIL ~ an air valve} located in {HEAD ~ the foundation rib} 
The hollow , vinyl plastic ribs are inflated with air through { TAIL ~ an air valve } located in { HEAD ~ the foundation rib }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD