| http://www.w3.org/ns/prov#value | - The surface density of the implanted carbon ions can be greater than about 1??1018 ion/cm2, or about 3??1018 ion/cm2, and the penetration of the carbon ions into the surface of the second component corresponds to carbon ion implantation at a beam energy of greater than about 50 keV. The first component of the bearing can be a rolling element, such as a ball, and the rolling element can be metal, i
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