The outer surface 58 has {HEAD ~ a first circumferentially extending groove} 64 which is slightly below the level of the lip 62 and accommodates {TAIL ~ a first annular ring seal} 66 and a second circumferentially extending groove 68 near to the bottom of the sleeve which accommodates a second annular ring seal 70 
accommodates
The outer surface 58 has { HEAD ~ a first circumferentially extending groove } 64 which is slightly below the level of the lip 62 and accommodates { TAIL ~ a first annular ring seal } 66 and a second circumferentially extending groove 68 near to the bottom of the sleeve which accommodates a second annular ring seal 70
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH