Expandable roller conveyors are used in a variety of industries, including manufacturing, distribution, and logistics. They can be used to move a wide range of products, including boxes, bags, and other packaged goods. Their expandability feature makes them ideal for environments where space is limited, as they can be easily retracted when not in use.

The bottom-driven roller conveyor is a type of conveyor system that utilizes rollers to move products or materials along the conveyor. The rollers are driven by a chain, which is located beneath the rollers and provides power to move the conveyor forward.

Gravity roller conveyor is a common material handling system, which is mainly composed of multiple metal or plastic rollers. The goods are automatically slid or pushed down by the force of gravity. This type of conveyor system does not require an external power source or other motorized equipment and can be directly installed on a flat surface. Therefore, it is usually used for the transportation of light to medium weight items such as packaging boxes, paper, lightweight mechanical parts, etc.