| prov:value
| - The rare earth magnets and powders thereof are known to the art and to the literature and often contain neodymium, samarium, praseodymium, iron, cobalt, and other alloying elements such as aluminum, boron, carbon, chromium, copper, gallium, hafnium, manganese, niobium, tantalum, titanium, vanadium, zirconium, and the like.
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