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ASTM A283 T91 P91 4130 42CrMo 15CrMo Alloy Carbon Steel Pipe ST37 C45 A106 Gr.B A53 20# 45# Q355B Seamless steel tube
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ASTM A106 A53 API 5L X42-X80 oil and gas carbon seamless steel pipe steel hollow bar for Latin America
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