45MnMoB Grade Drilling Pipe: The Hard-Core Solution for Extreme Conditions Engineered specifically for ultra-deep wells, high-pressure reservoirs, and highly abrasive formations, the 45MnMoB...Xem thêm
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ASTM A519 Core Barrel Inner Tube & Outer Tube 45MnMoB Seamless Steel Oil Well Drilling Pipe With Tight Tolerances