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1986年10月19日,我们为核工业部308地质勘探公司进行了一次1116米深井下爆破小直径钻杆作业,钻杆从110米深处炸断。效果令人满意。
On October 19, 1986, we conducted a blasting of a small diameter drill pipe at a depth of 1116 meters for 308 Geological Prospecting Company of the Ministry of Nuclear Industry. The drill pipe was blown at a depth of 110 meters. Satisfactory results.