Core Drilling Rig, Diamond Core Bit, PDC Bit manufacturer / supplier in China, offering 6" 8 1/2 9 7/8 12 1/4 15 1/2 Inch 171 311 mm IADC 535 TCI Tricone Rock Roller Drilling Bit for Water Oil Well, High-Performance Mining 8 1/2 Inch 12 1/4 IADC 535 Rock Roller Tricone Drill Bit Three Cone Roller Bit for Hard Formation, Finedrill High-Quality PDC Drill Bits for Various Geological Conditions and so on.
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