普通钢元素含量S≤（）%，P≤（）%。
0.045,0.045
0.045,0.050
0.035,0.045
0.045,0.035
GB/T1499.2-2018规范P8页、GB/T1499.1-2017规范P4页规定S≤0.045%，P≤0.045%
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