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Tianjin Zhengda General Steel Pipe Technology Co.,Ltd


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API 5L ERW Linepipe for Petroleum and Natural Gas Transportation
ASTM A53 High Frequency Longitudinal Seam Electric Resistance Welded (ERW) Carbon Steel Round Tube a
High Frequency Straight Seam Welded ERW Carbon Piling Pipe
High Frequency Longitudinal Seam ERW Carbon Steel Structural and Construction Tube and Pipe
Scaffolding Carbon Steel Pipe for Building and Construction
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