prov:value
| - In another aspect of the invention, the metallic material of the solid medium comprises at least one of the following elements: aluminum, copper, cobalt, gold, platinum, silicon, titanium, rhodium, indium, iron, palladium, germanium, tin, lead, tungsten, niobium, molybdenum, nickel, silver, zirconium, yttrium, and alloys thereof, including an alloy of iron, i.e., steel.
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