宝钢Y35易切削钢
上海宝钢1213易切削钢
11SMn30(1.0715)易切削钢
Y20易切削钢
Y35易切削钢
12L14易切削钢
1213易切削钢
SUH1 SUH1 SUH1 SUH1 SUH1 SUH1
SNCM439合金结构钢 SNCM439合金结构钢 SNCM439合金结构钢
SNCM439 SNCM439 SNCM439 SNCM439