First, the iron plate is cut with an angle grinder, and the stainless steel plate is cut with a cutting machine. All factories that process stainless steel have scraps.
Use an electric welding machine to make the iron plate into a rectangular iron trough, and make the triangle iron into a shelf and connect them. The stainless steel plate is welded by argon arc welding.
matters need attention
Pay attention to electricity safety and fire prevention,
Don't try if you can't weld.