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copper casting milling plantcopper cement aluminum

copper casting milling plantcopper cement aluminum

As early as 6000 B C native copper–the pure metalwas foundas reddish stones in the Med iterranean area and hammered into utensils weapons and tools Around 5000 B C artisans discovered that heat made copper more malleable Casting and smelting of copper began around 40003500 BC see figure 62 About

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