| http://www.w3.org/ns/prov#value | - In this situation it is preferable that conductive element 4 be rigid, and a convenient way to accomplish this is to use rigid material, such as acrylic sheet (Rohm & Haas Company, Philadelphia, Pa.) for example, as the insulating covers 7 and 8, and to seal around the edges at 9 with RTV silicone or other materials to encase the conductive element.
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