Stackable trolley tool box from China manufacturers tell you that trolleys for different purposes have different body structures. Most general-purpose four-wheeled carts have a cargo platform.

Stackable trolley tool box from China manufacturers tell you that special trolleys have a variety of structures, some of which are box-shaped, suitable for carrying light-weight and easy-to-load items; Components;
Stackable trolley tool box from China manufacturers tell you that some car body shapes are completely consistent with the goods, such as gas cylinder cars; some are very small and can be folded for easy portability;
The manufacturer of the Stackable trolley tool box from China tells you that in order to facilitate the loading and unloading of barrel-shaped goods such as barrels of liquid and paper rolls, there are two flat plates of steel on the car body to form a low slope, so as to facilitate the rolling up and down of the barrel, such as a cylindrical shape. Cargo handling truck. Modern trolleys are equipped with rolling bearings, and the wheels use solid tires or pneumatic tires.
The above information is the Stackable trolley tool box from China manufacturer's introduction and analysis of the Classification of trolleys, hope it helps you.