8 Years
Main details Standard: GB/T 9711 , SY/T 5037 , SY/T5040,API 5L Steel Grade: GB/T 9711: L175,L210,L245,L290,L320,L360,L390,L415,L450,L485,L555 SY/T 5037SY/T5040: Q235B,Q345BAPI 5L: A, B, X42, X46, X52, ...
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