... CNC, milling machine, drilling machine, numerical lathe, all types of lathe. 7.Surface finish process polishing, sand blasting, heat ... Aluminum motor cover:1. Aluminum casting, casting part, sand casting, die casting, gravity casting, high pressure ... CNC, milling machine, drilling machine, numerical lathe, all types of lathe.4. Surface finish process: polishing, sand blasting, heat treatment, ...