| http://www.w3.org/ns/prov#value | - In one embodiment, the first material is comprised of at least one of aluminum, copper, stainless steel, copper/chromium, aluminum/copper, or other alloys thereof, and the second material is comprised of a magnetic material, such as, Ni, stainless steel, transformer steel, or a ferromagnetic material with a permeability greater than 20.
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