U72152易切削钢 U72152易车铁 U72152易切钢
G41400合金钢G4140..
4140合金钢4140圆钢4..
SCM440合金钢SCM44..
38XM合金钢38XM圆钢3..
42crmo合金钢42crm..
G12144易切削钢 G12..