Is there a general standard for the purchase of shower rooms?

Vision, although this has nothing to do with life span, but the price is far from it! First of all, the surface treatment of aluminum alloy and aluminum billet will be brighter if it is used well, but there is basically no difference between the new ones, mainly because of its antioxidant effect. Ordinary manufacturers will generally start to dim after one year, and will be much worse than brand-new colors after two years ~ good manufacturers are still shiny! It's too easy to see for stainless steel. 1 is brightness and 2 is flatness. Stainless steel from ordinary manufacturers is uneven and can't be used as a mirror. Inside the stainless steel is Picasso's painting, and a good manufacturer is flat, just as some people think it is just flat. This is a big mistake. Under the same structure, the price of flat steel is twice as bad as that of aluminum alloy.