... 1,ISO9001:2000 certification. 2,Over 14 years experience in metal bending parts. 3,OEM order is welcome. Qingdao lianhai ... hydraulic co., ltd. is specialized in the large-scale welding, stamping, bending, punching, steel structure and all kinds of special-shaped ... as follows:1.Over 14 years experience in metal bending parts.2.OEM sheet metal stamping, punching ,welding part, CNC bending, cutting. ...