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... al copper, but it couldn’t raise the melting point to turn copper into molten copper.
Everyone knew that charcoal could be obtained by burning wood.
The advantage of charcoal is that it easily crumbles; the method is to burn the wood into charcoal, then smash it with stones, gather it up, and thus have fuel for burning even in winter.
But burning charcoal was also a skillful task, requiring timely exclusion of air, or it would turn into ash.
Tangtang filled charco ...
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