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FWIW I deal with a large Gas supplier locally that fills O2, Nitrogen , and CO2 from Liquid bulk tanks. ITs all the same, depends on the condition of the container(cylinder) . I know medical O2 and welding OX come from the same bulk tank, medical gas cylinders have to meet higher cleanliness specs than industrial, HTH
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When considering courage in battle, one should remember that there are 2 sides to every conflict.
The heroism of the losing side rarely gets remembered
but we were all husbands and fathers, sons and bros
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