... ,620,630, 6000, 6200, 6300, 16000 series.2) Materal used: GCr15—China.(AISI)52100—American,(Din)100Cr6—Germany.3) Shield/closure: open ... Co.,Ltd.AddressNo.15 Linbo Road, Linqing City, Shandong Province, China Tel/Fax(Tel):0086-0635-8870051 (FAX):0086-0635-8870051Mobile ...