... , turning, grinding, wire cutting,stamping,die casting,bending,injection,welding,laser engraving,knurled,hobing etc.4. More than 10 years of professional ... , turning, milling, grinding, welding, jig boring, stamping, die casting, laser cutting, engraving, injection,etc.Surface treatmentAnodizing, polishing, powder coating, sandblast , zinc/nickel ...