the Truck is a heavy duty towing mechanism that provides the motive power for the carriage of the towed load.
These units are usually equipped with diesel engine of a large volume; multiple axles; transmission.
the Combination of the tractor and trailer distributes the load on several axes, being more manoeuvrable than a rigid truck of equivalent size. The most common mounting system of the trailer is the coupling with the fifth wheel to quickly move between trailers, performing various functions, such as the truck and trailer.
Also meet the coupling of the clutch, especially in especially of spent ballast tractors of high power. Among all types of tractors popular tractor, used to transport different types of semi-trailers.