What is a Heavy Duty Cooking Pan?

While choosing an electric rice cooker, I found this cooker claims it's using a "Heavy Duty Cooking Pan", but I have no idea what does the term mean. What's the material of a Heavy Duty Cooking Pan?
http://www2.panasonic.com/consumer-electronics/shop/Home-Appliances/Kitchen-Appliances/Rice-Cookers/model.SR-42FZ.S_11002_7000000000000005702#tabsection

Well I don't know the exact material, but basically it won't dent/scratch/break as easily. It's made of a stronger metallic alloy.