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XJY750 30CrMnSiA BQ NQ HQ mining drill pipes steel tubing  1. Product Name: Seamless Steel Tubing wire-line drill rods 2. Size Range: AQ,BQ,NQ,HQ,PQ Length:3m,3.06m 5.8m/6m, maximal 11.8m 3. Stable Quality with Comeptitive Price 4. Protective Atmosphere Heat Treatment, Surface is clean and smooth, without oxide scale 5. Good Extending and Bending Ability, Longer Work Life Product Name Seamless Steel Tubing wire-line drill rods Material XJY750  Delivery Condition HR, CW, SR, A, N,Quenching & Tempering Standard ASTM GB9808 Application Wire-line drill rods Certificate TS16949, ISO 9001 HS code 7304319000…

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