0086 17701706555
jojoruan@heyinsteel.com
20CrMo 4118
H11 4Cr5MoSi
1035 1045 碳素
30CrMo 4130
D2 SKD11 1.2
S10C S20C S4
10B21 10B33
Q345 S355J2
4340 36CrNiM
联系人:Mrs.Ruan
手机:17701706555
电话:0086 17701706555
邮箱:jojoruan@heyinsteel.com
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