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The small size and thickness of the graphite 810 minimizes the weight of the graphite element 804. The graphite element 804 is preferably pliable such that a graphite element 804 can be rolled lengthwise without breaking the electrical path through the graphite 810. Advantageously, the graphite element 804 can be manufactured separately and provided for installation into a cover 800 during manufacturing of the covers 800. For example, the graphite element 804 may come with electrical connections 806 and 802 directly from a supplier such as EGC Enterprises Incorp. of Chardon, Ohio. The graphite elements 804 may be laid on top of an outer cover 302. The electrical connections 802 may be made to power connections 212 and one or more electric power couplings 214. One graphite element 804 may be connected to a second graphite element 804 by an electrical connection 806.

Added by DJM 2 2021