a flow restrictor coupled to one of the plurality of gas outlet ports, wherein {HEAD ~ the flow restrictor} is sized to provide {TAIL ~ flow conditions} that are substantially equal to flow conditions of the first and second gas inlets of the processing chamber 
a flow restrictor coupled to one of the plurality of gas outlet ports , wherein { HEAD ~ the flow restrictor } is sized to provide { TAIL ~ flow conditions } that are substantially equal to flow conditions of the first and second gas inlets of the processing chamber
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH