For transportating the heavy duty workpiece over 80T. Generally applicable for middle and long distance highway transport of oversize workpieces (over length, over width, over height and over weight) which exceed the weight or are not easy to dismantle in the industries, such as power construction mining, metallurgy, chemical industry, water power and thermal power generation equipment manufacturing, power plant construction, heavy duty mechanical manufacturing, oil field, bridge, loading and unloading operation, railway construction, etc.

The hydraulic modular trailer ( full or semi traction) is mainly compsed by the structures of flat grid main box beam vehicle frame, hydraulic suspension, three point support, hydraulic full wheel tractive turning or power assisted steering, double-pipe hydraulic circulating, etc. It has the advantages such as adjustable cargo platform height, even axle load, small turning radius, convenient go astern, etc. When running on upramp or downramp, as well as slope, the vehicle body can adjusted to the level position to ensure the stability of cargos. The hydraulic combined semi trailer is the product deriving from the full trailer. Both of them are identical on the sturcture and have the functions of longitudinal and vertical splice.