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2. Motorized wheelchair - Wikipedia

   en.wikipedia.org/wiki/Motorized_wheelchair

   A motorized wheelchair, powerchair, electric wheelchair, or electric-powered wheelchair (EPW) is a wheelchair that is propelled by means of an electric motor (usually using differential steering) rather than manual power. Motorized wheelchairs are useful for those unable to propel a manual wheelchair or who may need to use a wheelchair for ...

3. Shaft-driven bicycle - Wikipedia

   en.wikipedia.org/wiki/Shaft-driven_bicycle

   Dynamic Runabout 7 shaft-driven bicycle Drive-shaft housing. A shaft-driven bicycle is a bicycle that uses a drive shaft instead of a chain to transmit power from the pedals to the wheel. Shaft drives were introduced in the 1880s, but were mostly supplanted by chain-driven bicycles due to the gear ranges possible with sprockets and derailleurs ...

4. Drive shaft - Wikipedia

   en.wikipedia.org/wiki/Drive_shaft

   A drive shaft system weighs more than a chain system, usually 0.5–1 kg (1–2 lb) heavier. Many of the advantages claimed by drive shaft's proponents can be achieved on a chain-driven bicycle, such as covering the chain and sprockets. Use of lightweight derailleur gears with a high number of ratios is impossible, although hub gears can be used.

5. Spline (mechanical) - Wikipedia

   en.wikipedia.org/wiki/Spline_(mechanical)

   where the grooves of the inner and outer parts are formed as linear races filled with ball bearings to allow for free linear motion even under high torque. To allow longer travel the outer spline can incorporate channels to re-circulate the balls, in this way torque can be transferred from a long shaft while travelling up or down the length.

6. Spiral bevel gear - Wikipedia

   en.wikipedia.org/wiki/Spiral_bevel_gear

   Spiral bevel gear. A spiral bevel gear is a bevel gear with helical teeth. The main application of this is in a vehicle differential, where the direction of drive from the drive shaft must be turned 90 degrees to drive the wheels.

7. What Is Low Testosterone & What Causes It? - AOL

   www.aol.com/low-testosterone-causes-125700734.html

   Reduced Drive (Low Libido) One of the most common signs of low testosterone is a low drive (aka low libido). You may have less interest in activity or realize you’re not spending as much time ...

8. Princess Kate and William to Launch Mental Health Program in 2025

   www.aol.com/lifestyle/princess-kate-william...

   “Our innovative new partnership will drive proactive outreach and preventative measures to the whole community and form a vital step in better protecting the wellbeing of local people.

9. Constant-velocity joint - Wikipedia

   en.wikipedia.org/wiki/Constant-velocity_joint

   A Rzeppa-type CV joint. A constant-velocity joint (also called a CV joint and homokinetic joint) is a mechanical coupling which allows the shafts to rotate freely (without an appreciable increase in friction or backlash) and compensates for the angle between the two shafts, within a certain range, to maintain the same velocity.