{HEAD ~ The apparatus} 6 wherein {TAIL ~ said flexible gasket} comprises two of said flange receiving recesses and three longitudinal cavities 
wherein
{ HEAD ~ The apparatus } 6 wherein { TAIL ~ said flexible gasket } comprises two of said flange receiving recesses and three longitudinal cavities
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH