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2. 2020 Summer Olympics medal table - Wikipedia

   en.wikipedia.org/wiki/2020_Summer_Olympics_medal...

   The table uses the Olympic medal table sorting method. By default, the table is ordered by the number of gold medals the athletes from a nation have won, where a nation is an entity represented by a National Olympic Committee (NOC). The number of silver medals is taken into consideration next, and then the number of bronze medals.

3. Pocketknife - Wikipedia

   en.wikipedia.org/wiki/Pocketknife

   A collection of pocketknives A Swiss Army knife made by Victorinox. A pocketknife is a knife with one or more blades that fold into the handle. They are also known as jackknives (jack-knife), folding knives, EDC knife, or may be referred to as a penknife, though a penknife may also be a specific kind of pocketknife.

4. Hotel toilet paper folding - Wikipedia

   en.wikipedia.org/wiki/Hotel_toilet_paper_folding

   Toilet paper with folding. Hotel toilet paper folding is a common practice performed by hotels worldwide as a way of assuring guests that the bathroom has been cleaned. [1] The common fold normally involves creating a triangle or "V" shape out of the first available sheet or square on a toilet paper roll. Commonly, the two corners of that sheet ...

5. Solar panel - Wikipedia

   en.wikipedia.org/wiki/Solar_panel

   Manual cleaning tools are by far the most prevalent method of cleaning, most likely because of the low purchase cost. However, in a Saudi Arabian study done in 2014, it was found that "installed robotic systems, mechanized systems, and installed hydraulic systems are likely the three most promising technologies for use in cleaning solar panels".

6. Refrigerator - Wikipedia

   en.wikipedia.org/wiki/Refrigerator

   Food in a refrigerator with its door open. A refrigerator, commonly fridge, is a commercial and home appliance consisting of a thermally insulated compartment and a heat pump (mechanical, electronic or chemical) that transfers heat from its inside to its external environment so that its inside is cooled to a temperature below the room temperature. [1]

7. James M. Spangler - Wikipedia

   en.wikipedia.org/wiki/James_M._Spangler

   James Murray Spangler (November 20, 1848 – January 23, 1915) was an American inventor, salesman, and janitor who invented the first commercially successful portable electric vacuum cleaner that revolutionized household carpet cleaning. His device was not the first vacuum cleaner, but it was the first that was practical for home use.