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    Gold processing, preparation of the ore for use in various products. . Until the time of Christ, Egypt remained the centre of gold production. . By ad 100, up to 40,000 slaves were employed in gold mining in Spain. ... who did computations, but now the term almost universally refers to automated electronic machinery.

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    What you need is what we can do! In the future, Xinhai will continue to rely on three big supporting "technology, talents, management", adhere to the international development strategy, and concentrate on providing customers with modern, efficient, energy-saving mine overall construction and operational solution, to create international leading enterprises in mining industry.