0086 17701706555
jojoruan@heyinsteel.com
20CrMo 4118 SCM420 alloy steel
30CrMo 4130 25CrMo4 SCM430
Contact: Miss.Ruan
Phone: 17701706555
Tel: 0086 17701706555
Email: jojoruan@heyinsteel.com
Add: No.1588 Youyi Road, Baoshan District,Shanghai
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