Discussion on the working principle of expansion tank / air pressure / surge tank

The square storage rack trolley is not only practical, but can also become a home decoration that can be placed in the living room, bedroom, dining room and other areas with various vegetables and fruits. Small snack items, stationery, cosmetics, tableware, etc., so that they are no longer scattered around the home, causing chaos, and you can easily find them at any time. Make the interior more fashionable and beautiful.