N/a manufacturer / supplier in China, offering on-Site Maintenance Oiling Onshore Oil Field Special Vehicle Pumping Unit Maintenance Truck, 9 7/8" (250.8mm) IADC637g Tricone Rock Bit Used for Oil and Gas Drilling Rigs, Very Hard Rock Drill Bit, 5 5/8" (142.9mm) IADC537g Tricone Bit for Oil and Gas and so on.
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