| http://www.w3.org/ns/prov#value | - , which functions as the return electrode in this embodiment, the entire shaft 102 is preferably covered with an electrically insulative jacket 106, which is typically formed as one or more electrically insulative sheaths or coatings, such as polyester, polytetrafluoroethylene, polyimide, and the like, to prevent direct electrical contact between shaft 102 and any adjacent body structure or the su
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