What Is A Commercial Trailer?

What is a commercial trailer?
The trailer can only be combined with a tractor or other vehicle to form a complete means of transport. The total weight of the trailer borne by itself is called the full trailer, usually the full trailer is also referred to as the trailer. It is characterized by its own no power, independent bearing, relying on other vehicles to pull the vehicle trailer is a kind of unpowered road vehicle that needs to be pulled by a car in order to use normally on its design and technical characteristics, for carrying personnel or goods, special purposes.
Trailers are divided into full trailers and semi-trailers according to the connection between the trailer and the tractor. A trailer that is pulled by a tractor and whose entire mass is borne by itself; A trailer that is pulled by a tractor and part of its mass is borne by the tractor.