{HEAD ~ A device} 1, wherein the first mentioned orifice which is connectable to {TAIL ~ atmosphere} is larger than the second mentioned orifice which is connectable to atmosphere 
{ HEAD ~ A device } 1 , wherein the first mentioned orifice which is connectable to { TAIL ~ atmosphere } is larger than the second mentioned orifice which is connectable to atmosphere
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH