1. Warehousing of Hammer Disc Shaft
 2. Inspection & Disassembling
 3. Manufacture of Discs
   3-1. Material
   3-2. Normalizing Heat Treatment
   3-3. Fine Lathe Work
   3-4. Hard-Facing Welding
   3-5. Hole Boring Work
 4. Repair of Shaft
   4-1. Surface Welding
   4-2. Normalizing Heat Treatment
   4-3. Rough Lathe Work of Shaft
 5. Assembly of Shaft & Discs
 8. Fine Lathe Work of Hammer Disc Shaft
 9. Rust control, Painting, and Packaging