1. Materials
 2. Normalizing Heat Treatment
 3. Steel Plate Bending, Welding and Correction
 4. Normalizing Heat Treatment
 5. Rough Lathe Work of Sleeve
 6. Induction Heat Treatment on Outer Surface
 7. Milling Work
 8. Fine Lathe Work of Sleeve
 9. Cr-Plating & Polishing
 10. Rust control, Painting, and Packaging