Rotary Drilling Core Barrel Construction Roller Cone Bit

Model NO. :417/427/437/447/517/527/537/547/617/627/637/737/83 OEM :Yes Drilling Tool :Core Barrel Tail Part :Slightly Lower Hardness, Good Toughness Formation :for Slightly Weathered Rock Cermented Carbide :Super Coarse Particle, Hard Wearing and Hardness Body Material :20crnimoa for The Body, 15mnni4mo for The Wheel Transport Package :Wooden Cases Trademark :RIGPA Origin :China HS Code :8207130000 Production Capacity :10000000

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