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continuous mining equipment or machine or machinery

Continuous Miners A machine with a large rotating steel drum equipped with tungsten carbide teeth that scrape coal from the seam Operating in a “room and pillar” system – where the mine is divided into a series of 20to30 foot “rooms” or work areas cut into the coalbed – it can mine as much as five tons of coal a minute – more than a miner of the 1920s would produce in an

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