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... ral permanent magnet. Other permanent magnets can be made by subjecting certain materials to a magnetic force. When the force is removed, these materials retain their own magnetic properties. Although the magnetic properties may change over time or at elevated temperatures, these materials are generally considered to be permanently magnetized, hence the name. It was weird how Billy still could remember such a useless thing from his previous life. Still, it was being useful.
The same logi ...
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