Flatbed dollies are a common form of freight in distribution environments and are used to move bulk goods. Trolleys help reduce the force required to move a load by allowing the user to pull or push rather than lift and carry. [1] A very simple design provides a basic flat platform with four casters

A hand truck is an unpowered vehicle designed to be attached to a tractor, truck, or prime mover vehicle with strong traction.Classification by coupling configuration[edit]There are two basic types:• Conversion dollies, with one to three axles, designed to attach to the

The semi-trailer traction unit (Dolly) is mainly used for the connection of the front and rear trailers of a double trailer or a road train. As a key connection conversion device, the semi-trailer traction unit has played a huge role in promoting the development of automobile trains.

The application of semi-trailer towing trailers promotes the development of car trains from a simple single-trailer mode to a double-trailer or even multi-trailer mode, which greatly improves the efficiency of logistics and transportation. However, this form cannot be applied in China at present.

Always remember to control the steering wheel lock to rotate in the opposite direction to the reverse direction of the car, and observe the reversing mirror when reversing the trailer. A little more adjustment is appropriate.