The bead seat rubber 21 may also be {HEAD ~ a combination} of {TAIL ~ rubber components} each known for their particular location requirements 
The bead seat rubber 21 may also be { HEAD ~ a combination } of { TAIL ~ rubber components } each known for their particular location requirements
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH