The system method for aluminium circle falls on 3 sorts: stretch, die-casting and anodizing, and aluminum circle stress cooker is acquired through die-casting. By way of thickness it belongs to the thick type, extra appropriate for boiling soup for a long term. Pressure cooker aluminium circles are slower in heat conductivity, for they include severa micro holes within the internal shape.

By means of alloy types there are pure business aluminium circles and alloyed…