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