{HEAD ~ The polygonal rib structure} 12, wherein {TAIL ~ said polygonal rib structure} is a shock absorbing member 
{ HEAD ~ The polygonal rib structure } 12 , wherein { TAIL ~ said polygonal rib structure } is a shock absorbing member
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH