aluminium cover. 2,extrusion aluminium CNC machining 3,ISO9001 certified manufacturer. 4,20 years ... ,cutting5,deep processing ( punching / stamping, milling, taping, CNC machining, polishing.)6,surface treatment (wire drawing, deburring, anodizing, powder ... extrusion die mould, porthole die, Shenzhen Jinrui Aluminium Industry Co., Ltd. one of the best manufacturers of aluminium extruded sectionsbuilt ...