| http://www.w3.org/ns/prov#value | - I used a lot of Acetylene to gouge/groove with because of the carbon contamination caused by the Airarc process and although it was very expensive in fuel and especially Oxygen it was MUCH cleaner and somewhat faster to use the Oxy/Acetylene instead of carbon arc rods, liquid Oxygen saved a bundle in torch costs since this was done on a daily basis.
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