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Dagushan's iron mine whose iron ore is in its third fragmentation system is in the construction process, in which the vertical deep-hole blasting technology was adopted to excavate the fragment room.
介绍了大孤山铁矿在矿石三期破碎系统的建设过程中，采用垂直深孔爆破技术挖掘破碎峒室，使挖掘工期大幅度缩短。
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