| http://www.w3.org/ns/prov#value | - The conductive metal layer 178 is covered with a layer 179 of a suitable insulating material such as Parylene, polyethylene or PET which leaves a cylindrical distal extremity of the conductive metal layer 178 exposed (see FIG. 13) and which has the other extremity underlying the outer sleeve 46 and bonded thereto by the adhesive 47 as described in the previous embodiments.
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