The first sleeve is bonded to {TAIL ~ both a portion} of {HEAD ~ the exterior surface} of the core and a portion of the interior surface of the second sleeve 
The first sleeve is bonded to { TAIL ~ both a portion } of { HEAD ~ the exterior surface } of the core and a portion of the interior surface of the second sleeve
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH