Skeleton semi-trailer‌ is a special type of semi-trailer, mainly used to transport special cargo such as containers and dangerous goods tanks. Its structural features include the frame and front and rear axles connected by hinges, which can be quickly separated and connected. The main structure of the skeleton semi-trailer is the frame, which is usually made of high-strength ultra-heavy steel, with a high load-bearing capacity and the ability to adapt to various road conditions.‌