... 水力振击钻孔 hydraulic jar penetration 水力喷射钻孔机 water boring drill 钻孔水力循环系统 borehole hydraulic-circulating system ...
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Walter Herrera, quality control and risk manager for the Chilean mining company GeoTech, has said his company was bringing a specialized device -- a Scram T-130 drill typically used for boring water holes -- to the San Jose mine.
CNN: Drilling to reach Chile miners yet to begin
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