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