Down the Hole (DTH) Button Bits-ROSCHEN GROUP LIMITED
Down the Hole (DTH) Button Bits. Boart Longyear Down the Hole (DTH) Percussive Bits Maximum Performance & Durability for DTH Drilling . Down the Hole (DTH) Percussive Bits. Roschen's robust DTH bits are designed to extend bit life and in-hole drilling time with hardened premium steel alloy and tungsten carbide bits. Optimized flushing holes ...
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