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2. Trailer (vehicle) - Wikipedia

   en.wikipedia.org/wiki/Trailer_(vehicle)

   Full trailer with steered axle. A full trailer is a term used in the United States and New Zealand [5] for a freight trailer supported by front and rear axles and pulled by a drawbar. In Europe this is known as an A-frame drawbar trailer, and in Australia it is known as a dog trailer. Commercial freight trailers are produced to length and width ...

3. Poncelet wheel - Wikipedia

   en.wikipedia.org/wiki/Poncelet_wheel

   Typical efficiency of water wheels exploiting only the kinetic energy was around 30%. [1] These wheels are called stream water wheels, or kinetic water wheels. Instead, undershot water wheels are used in low head sites, like less than 1.5 m, and they also exploit the potential energy of the flow, with efficiencies of up to 84%.

4. Water wheel - Wikipedia

   en.wikipedia.org/wiki/Water_wheel

   An undershot wheel is a vertically mounted water wheel with a horizontal axle that is rotated by the water from a low weir striking the wheel in the bottom quarter. Most of the energy gain is from the movement of the water and comparatively little from the head.

5. 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]

6. Axle - Wikipedia

   en.wikipedia.org/wiki/Axle

   Railroad car wheels affixed to a straight axle, limiting them to rotate in unison. This is called a wheelset. A Denney axle. An axle or axletree is a central shaft for a rotating wheel or gear. On wheeled vehicles, the axle may be fixed to the wheels, rotating with them, or fixed to the vehicle, with the wheels rotating around the axle. [1]

7. Semi-trailer - Wikipedia

   en.wikipedia.org/wiki/Semi-trailer

   A tractor unit pulling a semi-trailer A truck pulling a semitrailer using a trailer dolly. A semi-trailer is a trailer without a front axle. The combination of a semi-trailer and a tractor truck is called a semi-trailer truck (also known simply as a "semi-trailer", "tractor trailer", or "semi" in the United States). [1]

8. Self-propelled modular transporter - Wikipedia

   en.wikipedia.org/wiki/Self-propelled_modular...

   All axles are individually controllable, in order to evenly distribute weight and to steer accurately. Each axle can swivel through 270°, with some manufacturers offering up to a full 360° of motion. The axles are coordinated by the control system to allow the SPMT to turn, move sideways or even rotate in place.

9. Watermill - Wikipedia

   en.wikipedia.org/wiki/Watermill

   Watermill of Braine-le-Château, Belgium (12th century) Interior of the Lyme Regis watermill, UK (14th century). A watermill or water mill is a mill that uses hydropower.It is a structure that uses a water wheel or water turbine to drive a mechanical process such as milling (grinding), rolling, or hammering.