| http://www.w3.org/ns/prov#value | - A roll member having, as a surface layer, a silicone rubber layer containing a metal compound MmXn and an inorganic fine powder, wherein M is a cation selected from among ions of Al, Sc, Cr, Fe, Co, Ni, Cu, Zn and Ga, X is an anion selected from among ions of halogens, inorganic acids and organic acids, and m and n are each a positive integer on condition that the valence number of m???M is equal
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