| http://www.w3.org/ns/prov#value | - Metals such as gold, silver, platinum, palladium, and alloys and combinations thereof are preferred for use as the cover layer 190 is comprised of 99.9% pure gold and is plated to a uniform thickness of about 1 ??m to 10 ??m, and preferably about 2 ??m to 5 ??m over all exposed surfaces of the lead material in the bond region.
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