| http://www.w3.org/ns/prov#value | - While the electromagnetic fields 104 and 105 are designed in such a manner as to not interfere with the operation of invasive and non-invasive medical devices there is a pressure sensitive activation switch 102 incorporated into the handle 101 of the wand 100 insuring that the wand 100 will only be in an active state when the operator has physically grasped the wand 100.
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