... ,aluminum Precision forging /Diecasting parts - Zamac , Copper ,Aluminum, Zinc Stamping part :1.stamping material :steel ,aluminum,zinc,stainless steel,copper2.surface ... .Process: investment casting, die casting, gravity casting, sand casting4.Machining: turning, milling, drilling, grinding, threading, CNC machining, etc.5.Finishing: sand blasting ...