Also shown are the exterior surface 23 of {TAIL ~ the top portion} 7 and the exterior surface 24 of {HEAD ~ the bottom portion} of the housing 
Also shown are the exterior surface 23 of { TAIL ~ the top portion } 7 and the exterior surface 24 of { HEAD ~ the bottom portion } of the housing
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH