| http://www.w3.org/ns/prov#value | - The sleeve 52 and the gas conduit 40 are spaced from one another to provide an annular gap 54 therebetween through which a pressurized gas such as air is adapted to flow in a forward direction and at a relatively high velocity toward the electrode 30, the latter of which is spaced a relatively short distance forward from the open outlet end 56 of the gas conduit 40.
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