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machines for excavating marble

machines for excavating marble

Apr 12, 2019· The real revolution of themarble extraction techniquestook 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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