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