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24 Inch GR.A GR.B DIN 30670 ASTM A53 ERW Black Steel Pipe
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GB/T9711 BS 1387 Astm A252 Grade 3 ERW Black Steel Pipe
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PSL1 ERW Line Pipe
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Brush Paint Oil Transmission Ground Erw Steel Tubes OD219MM
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Water Transimission Thickness 10.3mm ERW Line Pipe
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Hot Dip Galvanized API 5L X70 PSL1 PSL2 ERW Line Pipe
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