{HEAD ~ A self luminous microsphere} 1, wherein {TAIL ~ the gas} is at a pressure greater than atmospheric pressure 
wherein
{ HEAD ~ A self luminous microsphere } 1 , wherein { TAIL ~ the gas } is at a pressure greater than atmospheric pressure
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH