1. Material for Shaft
 2. Material for Boss
 3. Material for Plate
 4. Shell Bending, Welding, and Correction
 5. Fine Lathe Work of Shaft and Boss
 6. Shaft Milling Work
 7. Key Hole Slotter work for Boss
 8. Fine Lathe Work of Plate
 9. Welding Boss and Plate
 10. Assembling Plate & Shaft & Sheel
 11. Rubber Coating
 12. Rust control, Painting, and Packaging