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