{HEAD ~ a spring} around said {TAIL ~ closure valve} in said inner bore urging said valve normally away from closure, 
around
{ HEAD ~ a spring } around said { TAIL ~ closure valve } in said inner bore urging said valve normally away from closure ,
HEAD HEAD HEAD HEAD HEAD HEAD REL OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH