The WS modular trailer composed of 2-8 axis unit vehicles is able to realize the full and semi-trailer traction. The trailer-towing vehicle can reach the max traction when the speed is 40KM/H, applicable to the low speed and heavy load transportation; the speed of semi-trailer towing vehicle may reach up to 80KM/H, which can reduce the total length and turning radius of the vehicle, improving the useful load and speed of hydraulic trailer. There are military industrial R&D teams, process and modern CNC manufacturing to ensure the quality of the WS hydraulic combined trailer. With 8-year development, the Company has successfully developed A, B and C series WS Trailers, respectively corresponding to the international brands of hydraulic trailer products. By testing, the technical parameters and performance indexes of the series products have reached the advanced level in China.