---Bottom Sheet— Stretching—Punching Corner—Punching Pierce ----------------

Lock Hole

Cutting Panel -- 

--Top Sheet—Cutting Edge—Punching Corner—Pressing Outlet-------- 

Lock Hole       Wiring Hole

         ------Cutting Edge—————Punching Corner-----------------------------------------------

  ------------                           Lock Hole

         ------ Pressing Outlet—————----------------------------------------

            Wiring Hole

---Degreasing—Cleaning—Rust Prevention—Chamfering 45°—Flattening—Spot Welding—Shaping---

------Degreasing—Cleaning—Surface Finishing—Phosphating—Cleaning—Baking—Powder Coating---

------Solidifying—Cement Filled—Cement Curing—Cleaning —Inspecting —Packing