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A53 A106 Seamless Steel Pipes For Construction Oil And Gas Steel Pipes Api 5l Psl2 X42/X46/X60/X70 Dn 400 Seamless Standard: API5L ASTM ASME B36.10. DIN Material: API5LGr.B A106Gr.B, A105Gr.B, A53Gr.B...