{HEAD ~ a fluid control system} for controlling the flow of nitrous oxide and oxygen attached to the mounting surface structure, said {TAIL ~ fluid control system} including a fluid meter display mounted on a top surface of said fluid control system, said fluid meter display positioned along a vertical axis at less than 90 degrees relative to the mounting surface structure 
{ HEAD ~ a fluid control system } for controlling the flow of nitrous oxide and oxygen attached to the mounting surface structure , said { TAIL ~ fluid control system } including a fluid meter display mounted on a top surface of said fluid control system , said fluid meter display positioned along a vertical axis at less than 90 degrees relative to the mounting surface structure
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH