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DTH Drilling Tools

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潜孔钻进是将冲击力延伸至孔底的一种大直径钻孔。潜孔钻具具有直线度高、孔壁干净、钻杆和冲击器刚性好、轴向推力不大、不受钻孔深度限制、成本低等优点,在露天采矿中得到广泛应用。
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