The outer surface is secured to the inner cavity of {HEAD ~ the T} shaped {TAIL ~ two piece housing} 
shaped
The outer surface is secured to the inner cavity of { HEAD ~ the T } shaped { TAIL ~ two piece housing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL