Plasma gas, such as helium, argon, and mixtures of an inert gas with nitrogen, oxygen, air, carbon dioxide, methane, acetylene, propane, ammonia, or {TAIL ~ mixtures} thereof, can be used with this treater to sustain a uniform and steady plasma at {HEAD ~ atmospheric pressure} 
Plasma gas , such as helium , argon , and mixtures of an inert gas with nitrogen , oxygen , air , carbon dioxide , methane , acetylene , propane , ammonia , or { TAIL ~ mixtures } thereof , can be used with this treater to sustain a uniform and steady plasma at { HEAD ~ atmospheric pressure }
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