Semi-trailer tractor is a commercial vehicle with a special device for towing semi-trailer. The front with driving ability is called tractor, and the back without driving ability is called trailer.

Tractor is a brand, trailer is a brand. The brand of tractor is the same as that we usually see. For example, the brand of Beijing A 12345 trailer has a hanging word on it. Such as: Jing A 1234. So there are two brands.

Extended data:

Semi-trailer refers to a trailer whose axle is placed behind the center of gravity of the vehicle (when the vehicle is uniformly loaded) and equipped with a coupling device that can transmit horizontal and vertical forces to the tractor.

Semi-trailers are generally three-axle semi-trailers, which are divided into eleven-meter barn semi-trailers, thirteen-meter barn semi-trailers, low-level semi-trailers and other types. It is a heavy transport vehicle connected with the front of a semi-trailer through a traction pin.

Unlike full trailers, full trailers generally have two axles, and semi-trailers have only one axle. Semi-trailer refers to a vehicle driven by a main vehicle with the same load without power.

References:

Semitrailer _ Baidu Encyclopedia