{TAIL ~ Such an arrangement} would not have {HEAD ~ a vent follower} as illustrated in FIGS 5 through 7 
{ TAIL ~ Such an arrangement } would not have { HEAD ~ a vent follower } as illustrated in FIGS 5 through 7
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH