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  2. Three-point hitch - Wikipedia

    en.wikipedia.org/wiki/Three-point_hitch

    Three-point hitches are composed of three movable arms. The two lower arms—the hitch lifting arms—are controlled by the hydraulic system, and provide lifting, lowering, and even tilting to the arms. The upper center arm—called the top link—is movable, but is usually not powered by the tractor's hydraulic system.

  3. Continuous track - Wikipedia

    en.wikipedia.org/wiki/Continuous_track

    Continuous track or tracked treads are a system of vehicle propulsion used in tracked vehicles, running on a continuous band of treads or track plates driven by two or more wheels. The large surface area of the tracks distributes the weight of the vehicle better than steel or rubber tyres on an equivalent vehicle, enabling continuous tracked ...

  4. Ballastless track - Wikipedia

    en.wikipedia.org/wiki/Ballastless_track

    Slab track with flexible noise-reducing rail fixings, built by German company Max Bögl, on the Nürnberg–Ingolstadt high-speed line. A ballastless track or slab track is a type of railway track infrastructure in which the traditional elastic combination of sleepers and ballast is replaced by a rigid construction of concrete or asphalt.

  5. Tractor - Wikipedia

    en.wikipedia.org/wiki/Tractor

    The Ford N-series tractor helped revolutionize modern mechanized agriculture with its Ferguson three point hitch. A tractor is an engineering vehicle specifically designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a trailer or machinery such as that used in agriculture, mining or construction.

  6. Sisu Terminal Systems - Wikipedia

    en.wikipedia.org/wiki/Sisu_Terminal_Systems

    Sisu terminal tractor at Katajanokka quay in Helsinki. In autumn 1980, Sisu TR-200, which was the world's strongest terminal tractor by then, was presented in Portex fair in Hamburg . The Sisu terminal tractors could be designed relatively easily according to the customer requirements due to highly modulised structure; this led to success in ...

  7. Timeline of United States inventions (1890–1945) - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_United_States...

    Garage doors are necessarily large to allow passage of automobiles and/or trucks. In 1921, C. G. Johnson of Detroit invented the "Overhead Door", the first upward-lifting garage door. To market the garage door, Johnson mounted a small prototype of his door on the back of his Model T Ford and drove around the United States signing up distributors.

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