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2. Drawbar (haulage) - Wikipedia

   en.wikipedia.org/wiki/Drawbar_(haulage)

   A drawbar eye, also called tow eye, is a mechanical part to connect an independent trailer/dolly via a drawbar coupling to a tractor. [2] the eye is connected to the front end of a drawbar with bolt, flange-mounting or welding. [3] Most are made from high tension material to bear heavy loads while being pulled by the tractor.

3. Three-point hitch - Wikipedia

   en.wikipedia.org/wiki/Three-point_hitch

   The other main mechanism for attaching a load is through a drawbar, a single point, pivoting attachment where the implement or trailer is not in a fixed position with respect to the tractor. The primary benefit of the three-point hitch system is to transfer the weight and resistance of an implement to the drive wheels of the tractor.

4. Hydraulic modular trailer - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_modular_trailer

   Tiiger four-axle HMT module at Transporter Industry International headquarters in Haryana, India. A hydraulic modular trailer (HMT) is a special platform trailer unit which feature swing axles, hydraulic suspension, independently steerable axles, two or more axle rows, compatible to join two or more units longitudinally and laterally and uses power pack unit (PPU) to steer and adjust height. [1]

5. Towing - Wikipedia

   en.wikipedia.org/wiki/Towing

   Trailers designed to be hauled in an 18-wheel tractor-trailer configuration, which come in many configurations: Roll trailer, Flat bed or open trailers, which are platforms with no sides or stakes. This type of trailer works well for hauling large or unconventional shaped objects. Some are small enough to be towed behind cars.

6. Semi-trailer truck - Wikipedia

   en.wikipedia.org/wiki/Semi-trailer_truck

   Conventional style cab tractor A cab over semi-tractor Tractor with an end-dump trailer A FAW semi-trailer truck in China A semi-trailer truck (also known by a wide variety of other terms - see below) is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-trailer attaches to the tractor with a type of hitch called a fifth wheel. Other terms There are a wide ...

7. Ballast tractor - Wikipedia

   en.wikipedia.org/wiki/Ballast_tractor

   With a semi-trailer, ballast is added in the form of the weight of the attached trailer pressing down upon the tractor's fifth wheel. Since the load is separate from a ballast tractor, it provides no ballast: the drawbar only transmits a horizontal force. [citation needed] High inertia is encountered when starting to move a heavy load.