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