The Representative Grades:(1), Q235qC, Q345qC(16Mnq),Q370qC, Q420qC Executive Standard: GB/T714 (2),Q235GJC, Q345GJC, Q390GJC, Q420GJC, Q460GJC Executive Standard: GB/T19879 (3), 14MnNbq, WDB620,Q500CFExecutive Standard: Special ConditionMain...
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