A.磷B.硅C.錳D.硫
A.錳的平均質(zhì)量分數(shù)是0.60%B.碳的平均質(zhì)量分數(shù)是6.0%C.碳的平均質(zhì)量分數(shù)是0.60%D.錳的平均質(zhì)量分數(shù)是6.0%
A.Q235B.16MnC.40CrD.T8
