30CrMnSiA Grade Drilling Pipe: High Strength, Corrosion Resistance & Weldability for Demanding Oilfield Applications The 30CrMnSiA-grade drilling pipe is a premium low-alloy high-strength ...Veja mais
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30CrMnSiA Seamless Steel Oil Well Pipe DIN2391 Standard Drilling Rod Tube for High-Pressure Drilling