... 2. 35 years casting experience 3. CNC, all types of laths Marine retaining ring/ casting part 1. steel casting part 2. 10 ... years casting experience 3. CNC, all types of laths 4. OEM ... machining CNC, milling machine, drilling machine, numerical lathe, all types of lathe. 7.Surface finish process polishing, sand blasting, heat treatment ...