said fluid control system including a mixed gas output connector fluidly connected to said {HEAD ~ single nitrous oxide} and {TAIL ~ oxygen tube} 
said fluid control system including a mixed gas output connector fluidly connected to said { HEAD ~ single nitrous oxide } and { TAIL ~ oxygen tube }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL