Semi-trailer, is a technical term used in railway science and technology to refer to a special type of trailer. This type of trailer has no power of its own, and needs to be carried in common with the main vehicle (tractor) and relies on the traction of the main vehicle to move. The axles of a semi-trailer are usually placed behind the vehicle's center of gravity (when the vehicle is evenly loaded) and are fitted with couplings that transmit horizontal or vertical forces to the tractor. This design allows the semi-trailer to more effectively distribute weight and improve transportation efficiency.

In practice, semi-trailers are widely used for long-distance cargo transportation. They can transport goods from one place to another quickly and safely via road networks such as highways. In addition, there are many different types and specifications of semi-trailers to meet the transportation needs of different goods. As the leading semi trailer manufacturer and supplier, KDZG offer durable, and customizable trailers to meet all our customers' transportation needs.