... , aluminums alloy, brass, copper etc. Equipment: Common lathe, CNC machining Metal Process: CNC turning, machining, milling, drilling, planning, grinding, welding. Surface ... Treat: Zn (Cr3 RoHS free or Cr6 ) plated, Cr /Ni plated, hot-dip galvanizing, paint, anodize, powder coating, brush, Polish ...