{HEAD ~ An annular groove} is disposed between {TAIL ~ the sealing portion} and the tip portion wherein the tip portion is spaced from the tip wall to provide a leakage path between the annular groove and the second check end 
is disposed between
{ HEAD ~ An annular groove } is disposed between { TAIL ~ the sealing portion } and the tip portion wherein the tip portion is spaced from the tip wall to provide a leakage path between the annular groove and the second check end
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL 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