{HEAD ~ Vent} 22 also includes {TAIL ~ a generally disk shaped area} 44 of flask top 16 for interconnection with valve 46 
{ HEAD ~ Vent } 22 also includes { TAIL ~ a generally disk shaped area } 44 of flask top 16 for interconnection with valve 46
HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH