{HEAD ~ The slight reduction} in {TAIL ~ the diameters} of portions of the valve may be characterized as somewhat of a collapsing motion which can occur around the distal end of the lid seal post 502 and which further facilitates the sealing of the valve 345 by the lid seal post 502 
in
{ HEAD ~ The slight reduction } in { TAIL ~ the diameters } of portions of the valve may be characterized as somewhat of a collapsing motion which can occur around the distal end of the lid seal post 502 and which further facilitates the sealing of the valve 345 by the lid seal post 502
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH