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Other Mineral and Stone Treaters |
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71290 |
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This group includes mineral treaters not elsewhere classified, for example those operating equipment to dissolve gold and silver in cyanide solution to separate it from gangue; removing impurities from minerals by means of running water; operating vibrating and oscillating screens or tables to size or separate minerals; tending machines that compress finely ground minerals or coal into briquettes or pellets; and operating machines which separate minerals by magnetism. |
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