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The magnet manufacturers realized long ago that they could save a lot of cost of

production, and sell a lot more of their product, if they just packaged one of each

kind in every unit. So nowadays, whichever kind of magnet you want to buy, you

automatically get another one of the other kind along with it, and they're built into

a single piece. It's become such a standard of the industry that you can't find just

a positive or a negative magnet to buy all by itself.

And you can't even make one, either . . . . .

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13y ago

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