prov:value
| - All ferromagnetic and ferrimagnetic substances, including, but not limited to, magnetic Fe3 O4, ??-iron oxide (Fe2 O3), ferrites of the form MO.Fe2 O3, wherein M is a metal or mixture of metals such as Zn, Mn, Cu, etc.; ferromagnetic elements including iron, nickel, cobalt and gadolinium, alloys of ferromagnetic elements, etc., may be used as the magnetizable and fluidizable particulate solids whi
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