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Steel Material: Q235A, Q235B, Q345, ASTM A53/106, S235, S355, S275, API 5L GR.A/B, L245 L290 X42 X46 X70 X80 Standards:SY/T5037-2000,GB/T9711.1-1997, EN10225, EN10210, EN10219, GB/T9711.2-1997,API 5L ...