| http://www.w3.org/ns/prov#value | - The worktable 22, and thereby the workpiece(s) 20, may be negatively biased at about 20 V or more, e.g. up to about 200 V, including all values and increments between 20 V and 200 V therein, such as 200 V, 40 V, etc., via the energy source 18.
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