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2. These Rotating Curling Irons Make Styling Your Hair So ... - AOL

   www.aol.com/rotating-curling-irons-styling-hair...

   S.75 Rotating Curling Iron. Beachwaver has a whole line of rotating curling irons with different barrel sizes that are all Cosmopolitan faves, but I picked this 0.75" one because sometimes you ...

3. List of vacuum tubes - Wikipedia

   en.wikipedia.org/wiki/List_of_vacuum_tubes

   4CX250BC – 250 W Ceramic tetrode, forced-air cooled, version 'BC' 4CX35000 – Ceramic tetrode used in numerous 50-kW broadcast transmitters, forced-air cooled, often in a Doherty configuration as in the Continental Electronics 317C series. 5-125B/4E27A – 75 MHz, 125 W Glass power pentode; 5-500A – 500 W Glass radial-beam pentode

4. Sheet metal - Wikipedia

   en.wikipedia.org/wiki/Sheet_metal

   Sheet metal of iron and other materials with high magnetic permeability, also known as laminated steel cores, has applications in transformers and electric machines. Historically, an important use of sheet metal was in plate armor worn by cavalry , and sheet metal continues to have many decorative uses, including in horse tack .

5. Washer (hardware) - Wikipedia

   en.wikipedia.org/wiki/Washer_(hardware)

   They may also be used in rotating applications, as a bearing. A thrust washer is used when a rolling element bearing is not needed either from a cost-performance perspective or due to space restraints. Coatings can be used to reduce wear and friction, either by hardening the surface or by providing a solid lubricant (i.e. a self-lubricating ...

6. Rotating unbalance - Wikipedia

   en.wikipedia.org/wiki/Rotating_unbalance

   Rotating unbalance is the uneven distribution of mass around an axis of rotation. A rotating mass, or rotor, is said to be out of balance when its center of mass (inertia axis) is out of alignment with the center of rotation (geometric axis). Unbalance causes a moment which gives the rotor a wobbling movement characteristic of vibration of ...

7. Pipe (fluid conveyance) - Wikipedia

   en.wikipedia.org/wiki/Pipe_(fluid_conveyance)

   Aluminum pipe or tubing may be utilized where iron is incompatible with the service fluid or where weight is a concern; aluminum is also used for heat transfer tubing such as in refrigerant systems. Copper tubing is popular for domestic water (potable) plumbing systems; copper may be used where heat transfer is desirable (i.e. radiators or heat ...