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Astm A572 Carton Steel Tube , Black Welded Steel Tube Sch 40 Sch60 Sch 802017-03-29 18:36:24 |
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ERW carbon steel pipe in Tianjin for low pressure liquid transportation,2017-03-28 21:39:04 |
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China Suppliers Carbon Steel Erw Pipe Making Machine,Used Steel Pipe2017-03-28 21:39:04 |