aluminium cover. 2,extrusion aluminium CNC machining 3,ISO9001 certified manufacturer. 4,20 years ... experience 5,OEM/ODM Application range; aluminium housing,alumnium out cover, ... production 4,cutting5,deep processing ( punching / stamping, milling, taping, CNC machining, polishing.)6,surface treatment (wire drawing, deburring, anodizing, ...