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DIN 1629 st37 st44 st55 st52 CK45 GB T8162 10 20 45 for manufacture of pipelines equipment pipe fittings and steel structures
Tianjin Tianyingtai TYT High Quality Shock Absorber Pipe St52.3 Ck45 H8 H9 Steel Tube St52 Honed Aisi 1020 S45C Tubing
ST37 ST44 ST52 Seamless Cold Drawn Inner Hexagon Steel Pipe
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Precision Steel Pipe DIN2391 ST52 NBK
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2018 st52 10mm thick steel plate high strength low alloy steel price per ton
20 s53 st52 Hot rolled schedule 80 carbon steel pipe