... OEM 4) ISO9001:2000 Certified Materials: Iron or Aluminium alloy,etc., Process : Sand Casting , Gravity Casting ... CAD , Solidwork , CAXA UG , CAD/CAM/CAEPrecision machining : CNC , Milling , drilling , numerical latheSurface finish : Polishing , sand ... : Car, traffic, machines etc., also, the tooling, CNC machined, Lathe, Chemical etching, sandblasting, polishing & grinding, powder coating ...