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2. 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. High capacity, heavy duty ...

3. Trapezoidal thread form - Wikipedia

   en.wikipedia.org/wiki/Trapezoidal_thread_form

   Basic Acme thread profile. The Acme thread form has a 29° thread angle with a thread height half of the pitch; the apex (or crest) and valley (or root) are flat.This shape is easier to machine (faster cutting, longer tool life) than a square thread.

4. Stem (bicycle part) - Wikipedia

   en.wikipedia.org/wiki/Stem_(bicycle_part)

   Quill stem classic single-piece type Threadless stem shown with cable hole. The stem is the component on a bicycle that connects the handlebars to the steerer tube of the bicycle fork. Sometimes called a goose neck, [1] a stem's design belongs to either a quill or threadless system, and each system is compatible with respective headset and fork ...

5. Screw thread - Wikipedia

   en.wikipedia.org/wiki/Screw_thread

   Screw thread, used to convert torque into the linear force in the flood gate.The operator rotates the small vertical bevel gear in the center. Through mechanical advantage this causes the horizontal bevel gears (at far left and far right, with threaded center holes) to rotate.

6. Trump’s power grab could dissuade military leaders from ...

   www.aol.com/news/trump-power-grab-could-dissuade...

   An executive order issued by President Donald Trump this week that seems to give him huge power to interpret the law is raising concerns among legal experts that it could dissuade military ...

7. Ballast tractor - Wikipedia

   en.wikipedia.org/wiki/Ballast_tractor

   Most heavy haulage and heavy lift engineering firms employ heavy duty tractor-unit models that can accommodate a ballast box. Countries where modernization is taking place, such as regions of the Middle East and South Africa and Asia, operate larger number of ballast tractors due to the greater frequency of heavy loads (such as power station ...