{HEAD ~ a main spring} in said {TAIL ~ main valve chamber} with one end bearing against said main valve means and its other end bearing against said body and tending to force said main valve means away from said seat, 
in
{ HEAD ~ a main spring } in said { TAIL ~ main valve chamber } with one end bearing against said main valve means and its other end bearing against said body and tending to force said main valve means away from said seat ,
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH 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 OTH OTH