{HEAD ~ The closure} of {TAIL ~ tapered slits} 2 insures that no air passes through the opening 70 of cap 17 and through valve body 1 into passage 11 
{ HEAD ~ The closure } of { TAIL ~ tapered slits } 2 insures that no air passes through the opening 70 of cap 17 and through valve body 1 into passage 11
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