N/a manufacturer / supplier in China, offering 8 3/4" (222mm) Tricone Drill Bit, IADC 537 for Oil Drilling, 12 1/4" (311mm) Tricone Drill Bit, IADC 537 for Hard Rock Drilling, 2025 Factory Price Selling 98mm TCI Oil Single Roller Cone Bit/One Cone Bit and so on.
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