| http://www.w3.org/ns/prov#value | - In a case where the metallic materials of different types are copper and aluminum, metallic materials whose ionization tendencies in the electrochemical series with respect to plain water are positioned between that of copper and that of aluminum are Co, Mo, Cr, and Ni, while metallic materials whose ionization tendencies in the electrochemical series with respect to saline water are positioned th
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