PDC mining drill bitsProduct Advantages:1. PDC cutters for high speed drilling; 2. All cutters are premium grade for extended bit life and durability; 3. Cutter layout is
PDC anchor shank drill bit(mining drill bits)Product Advantages: 1. PDC cutters for high speed drilling; 2. All cutters are premium grade for extended bit life and durability; 3. Cutter layout i
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