ASTM A53A/A53B/ A178C/A106B API5L. ST37,ST37-2,DIN 1629 ST35, ST45,DIN 17175 ST35.8,DIN 17175 19MN5. 16MN,Q345B,T1,T2,T5,T9,T11,T12,T22,T91,T92,P1,P2,P5,P9 ...
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