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pkaye
on Dec 7, 2022
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TSMC ups Arizona investment from $12B to $40B with...
I've read Spruce Pine, North Carolina has the world's purest source of natural quartz best suited for making silicon wafers.
https://en.wikipedia.org/wiki/Spruce_Pine_Mining_District
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Search:
https://en.wikipedia.org/wiki/Spruce_Pine_Mining_District