A semi-trailer is a trailer whose axle is placed behind the center of gravity of the vehicle (when the vehicle is uniformly loaded) and is equipped with a coupling device that can transfer horizontal or vertical forces to the tractor! Generally, the trailer has two axles and the semi-trailer has one axle. Semi trailer refers to a vehicle that has no power and is carried together with the main vehicle and driven by the traction of the main vehicle.
In short, the full trailer is connected with the truck in front with a hook. It is very common in long-distance transportation that one carriage (or multiple) is hung behind the truck, which is the full trailer. The semi-trailer is connected with the traction seat of the tractor through the traction pin. The common container transport vehicle is a typical semi-trailer, and the loading part behind is a semi-trailer.
