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PDC drill bits:
New products with super long life, high efficiency and wide application.
1. PDC drill bits (non-core bits)
Application for penetration of gas hole, water-discharging hole, and grout hole under coal mine.
Size: dia 48-dia 270mm
Concave model, Pillar model, Blade model, Expansion model
If you are also interested in http://www.drillingrigts.com/