| http://www.w3.org/ns/prov#value | - The Al--Ti used for the reflective layer may be alternatively replaced by any of elements, including Au, Ag, Cu, C, Si, Ge, Al, Ni, Fe, Co, Cr, Ti, Pd, Pt, W, Ta, Mo, and Sb, alloys, compounds, and mixtures formed mainly of any of the elements, layers and multi-layers of the alloys, and composite layers of them with oxides and similar materials.
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