A series of passageways 63 extend radially between the inner and outer surfaces 60, 58 of {HEAD ~ the sleeve} 14 above {TAIL ~ the level} of the lip 62 
A series of passageways 63 extend radially between the inner and outer surfaces 60 , 58 of { HEAD ~ the sleeve } 14 above { TAIL ~ the level } of the lip 62
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH