It is a special vehicle specially designed to transport liquid goods, especially flammable and explosive liquids such as petroleum, gasoline, diesel and so on. It is usually composed of one or more cylindrical tanks and a chassis. The inside of the tank may be provided with partitions to separate different types of liquids. The tank body is usually made of high-quality steel or aluminum alloy to ensure strength and safety, while reducing its own weight and increasing its effective load. Equipped with a dedicated loading and unloading system, including top or bottom manhole covers and loading and unloading pipes to facilitate quick loading and unloading of liquids. It is an indispensable part of the supply chain of petrochemical products and plays an important role in ensuring energy supply and logistics transportation.