| http://www.w3.org/ns/prov#value | - The present invention comprises any means for moving the tip over the surface whatsoever, whether by manipulation of the handle (such as for example the rolling of FIG. 3), by moving the handle about (e.g., the embodiment of FIG. 4), or by some other control, e.g. computer/servo control or surgeon-operated pneumatic, hydraulic, or electric control or power.
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