The outer surface of the cooling tube 554 is further configured to cooperate with {HEAD ~ an inner surface} of {TAIL ~ the sleeve} 56 to sealingly enclose the cooling channel 558 
The outer surface of the cooling tube 554 is further configured to cooperate with { HEAD ~ an inner surface } of { TAIL ~ the sleeve } 56 to sealingly enclose the cooling channel 558
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH