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2. Caster board - Wikipedia

   en.wikipedia.org/wiki/Caster_board

   A caster board, vigorboard or waveboard is a two-wheeled, human-powered land vehicle. Other names are J-board and RipStik (sometimes written ripstick or rip stick), both of which are derived from commercial brands. A caster board has two narrow platforms known as "decks" that are joined by a torsion bar, which consists of a metal beam, usually ...

3. Continuous casting - Wikipedia

   en.wikipedia.org/wiki/Continuous_casting

   Continuous casting, also called strand casting, is the process whereby molten metal is solidified into a "semifinished" billet, bloom, or slab for subsequent rolling in the finishing mills. Prior to the introduction of continuous casting in the 1950s, steel was poured into stationary molds to form ingots. Since then, "continuous casting" has ...

4. Caster - Wikipedia

   en.wikipedia.org/wiki/Caster

   A swivel caster. A caster (or castor) is an undriven wheel that is designed to be attached to the bottom of a larger object (the "vehicle") to enable that object to be moved. Casters are used in numerous applications, including shopping carts, office chairs, toy wagons, hospital beds, and material handling equipment.

5. Caster angle - Wikipedia

   en.wikipedia.org/wiki/Caster_angle

   The caster angle[1] or castor angle[2] is the angular displacement of the steering axis from the vertical axis of a steered wheel in a car, motorcycle, bicycle, other vehicle or a vessel, as seen from the side of the vehicle. The steering axis in a car with dual ball joint suspension is an imaginary line that runs through the center of the ...

6. Ackermann steering geometry - Wikipedia

   en.wikipedia.org/wiki/Ackermann_steering_geometry

   Ackermann geometry. The Ackermann steering geometry is a geometric arrangement of linkages in the steering of a car or other vehicle designed to solve the problem of wheels on the inside and outside of a turn needing to trace out circles of different radii. It was invented by the German carriage builder Georg Lankensperger in Munich in 1816 ...

7. Ball transfer unit - Wikipedia

   en.wikipedia.org/wiki/Ball_transfer_unit

   A ball transfer unit is an omnidirectional load-bearing sphere mounted inside a restraining fixture. They are identical in principle to a computer trackball (pointing device). Typically the design involves a single large ball supported by smaller ball bearings. They are commonly used in an inverted ball up position where objects are quickly ...

8. List of skateboarding terms - Wikipedia

   en.wikipedia.org/wiki/List_of_skateboarding_terms

   180 heelflip: A heelflip with a 180 degree board and body turn either backside or frontside. 180 kickflip: A kickflip with a 180 degree board and body turn either backside or frontside. 360 flip or Tre flip: A 360 shove it and a kickflip. The board does one full rotation. 50-50 grind: A grind on both trucks.

9. Freestyle skateboarding tricks - Wikipedia

   en.wikipedia.org/wiki/Freestyle_skateboarding_tricks

   A freestyle skateboarding trick is a trick performed with a skateboard while freestyle skateboarding. Some of these tricks are done in a stationary position, unlike many other skateboarding tricks. The keys to a good freestyle contest run are variety, difficulty, fluidity, and creativity. This is an incomplete list, which includes most notable ...