日本合金结构钢SMn420,SMn433,SMn438,SMn443,SCr415,SCr420,SCr430,SCr440?,SCr445?,SCM415?,SCM418?,SCM420?,SCM421?,SCM425,SCM430,SCM432,SCM435,SCM440,SCM445,SCM822,SNC236,SNC415,SNC631,SNC815,SNC836,SNCM220,SNCM415,SNCM420,SNCM431,SNCM439,SNCM447,SNCM616,SNCM625,SNCM630,SNCM815,SACM645?
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