{TAIL ~ The assembly} is provided with {HEAD ~ ribs} extending entirely around the bottom surface of the seat for improved structural support 
{ TAIL ~ The assembly } is provided with { HEAD ~ ribs } extending entirely around the bottom surface of the seat for improved structural support
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH