In one embodiment, an apparatus for delivering gases to a semiconductor processing system includes a plurality of gas input lines each having an inlet port and a plurality of gas output lines {HEAD ~ each} having {TAIL ~ an outlet port} 
having
In one embodiment , an apparatus for delivering gases to a semiconductor processing system includes a plurality of gas input lines each having an inlet port and a plurality of gas output lines { HEAD ~ each } having { TAIL ~ an outlet port }
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