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how in the mining of marble

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how in the mining of marble

Apr 12 2019 · The real revolution of the marble extraction techniques took place at the end of the 19th century with the invention of the helical wire and the penetrating pulley The technique is based on a 4 to 6 millimeters diameter steel wire combined with the abrasive action of silica sand and an abundant amount of water as a lubricant

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