said {HEAD ~ fluid seal assembly} comprising {TAIL ~ at least one seal groove} in said sleeve with two axially spaced radial sealing wall surfaces, said sealing wall surfaces being opposed and substantially parallel, one with respect to the other 
said { HEAD ~ fluid seal assembly } comprising { TAIL ~ at least one seal groove } in said sleeve with two axially spaced radial sealing wall surfaces , said sealing wall surfaces being opposed and substantially parallel , one with respect to the other
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH OTH OTH OTH OTH