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2. Stand-alone power system - Wikipedia

   en.wikipedia.org/wiki/Stand-alone_power_system

   Start-up: High current drawn by some loads during start-up Current spikes during the start-up can overload the system temporarily. Reactive power: The circulating current can differ from the current consumed when capacitive or inductive loads are used. Harmonic distortion: Non-linear loads may create distortion of the inverter waveform.

3. Fan (machine) - Wikipedia

   en.wikipedia.org/wiki/Fan_(machine)

   A household electric fan A large cylindrical fan. A fan is a powered machine that creates airflow. A fan consists of rotating vanes or blades, generally made of wood, plastic, or metal, which act on the air. The rotating assembly of blades and hub is known as an impeller, rotor, or runner. Usually, it is contained within some form of housing ...

4. Free climbing - Wikipedia

   en.wikipedia.org/wiki/Free_climbing

   The free climbing movement was an important development in the history of rock climbing. [3] In 1911, Austrian climber Paul Preuss started what became known as the Mauerhakenstreit (or "piton dispute"), by advocating for a transition to "free climbing" via a series of essays and articles in the German Alpine Journal where he defined "artificial aid" and proposed 6 rules of free climbing ...

5. USA Climbing - Wikipedia

   en.wikipedia.org/wiki/USA_Climbing

   USA Climbing is the national governing body of the sport of competition climbing in the United States. [1] As a 501(c)3 non-profit, they promote Sport Climbing which comprises three competition disciplines: bouldering, lead climbing, and speed climbing, in elite, youth and collegiate formats.

6. Glossary of climbing terms - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_climbing_terms

   A form of climbing in which a lead climber clips their belay rope into protection equipment as they ascend. [1] [2] lead climber. Also leader. The individual ascending the route in lead climbing; the other person is the belayer. [1] [2] leader fall A lead climber fall while lead climbing; will be at least twice the distance to the last piece of ...

7. Hand fan - Wikipedia

   en.wikipedia.org/wiki/Hand_fan

   Handheld Brise fan from 1800. A handheld fan, or simply hand fan, is a broad, flat surface that is waved back-and-forth to create an airflow. Generally, purpose-made handheld fans are folding fans, which are shaped like a sector of a circle and made of a thin material (such as paper or feathers) mounted on slats which revolve around a pivot so that it can be closed when not in use.