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The top documents tagged [blast mining]
Coal Mining The goal of coal mining is to economically remove coal from the ground. Coal is valued for its energy content, and since the 1880s is widely
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Coal Mining The goal of coal mining is to economically remove coal from the ground. Coal is valued for its energy content, and since the 1880s is widely
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Manganese is a chemical element, designated by the symbol Mn. Manganese is a silvery-gray metal resembling iron. It is hard and very brittle,
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Prepared by: Johanne Miguel F. Aca -ac Vanessa May A. Enriquez
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