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    Used excavator and used construction machinery equipmenton sale. which specializes in the business of used excavator and other old construction machinery equipment.

  • Mining Wikipedia

    The water was used for a variety of purposes, including removing overburden and rock debris, called hydraulic mining, as well as washing comminuted, or crushed, ores and driving simple machinery. The Romans used hydraulic mining methods on a large scale to prospect for the veins of ore, especially a now-obsolete form of mining known as hushing.