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A comment on An electric motor that does not need expensive rare-earth magnets. Parent comment

Re:An electric motor that does not need expensive rare-earth... by pbhjpbhj on Friday November 16, 2012 @05:17AM (#4793248)
It's not especially rare but it is often difficult to extract. It's certainly not limitless either.

http://web.mit.edu/newsoffice/2012/rare-earth-alternative-en... http://www.rtcc.org/sei-scarcity-of-metals-could-hamper-low-...

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