DTH rock drill bit CIR90-90 - zhuzhoujinxin.com
DTH rock drill bit CIR90-90. Features of CIR 90 low air pressure DTH drill bit: 1. High hardness, good wear resistance and high impact resistance. 2. Fast drilling speed and long service life. 3. A number of innovative designs adapt to various complex situations and meet different drilling needs. 4.
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