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2. Wratten number - Wikipedia

   en.wikipedia.org/wiki/Wratten_number

   Wratten number. Wratten numbers are a labeling system for optical filters, usually for photographic use comprising a number sometimes followed by a letter. The number denotes the color of the filter and its spectral characteristics, and these numbers can be grouped into broad categories, but the numbering system is arbitrary within a group and ...

3. Sand filter - Wikipedia

   en.wikipedia.org/wiki/Sand_filter

   Sand filter. Sand filter used for water treatment. Sand filters are used as a step in the water treatment process of water purification . There are three main types; rapid (gravity) sand filters, upward flow sand filters and slow sand filters. All three methods are used extensively in the water industry throughout the world.

4. Ceramic water filter - Wikipedia

   en.wikipedia.org/wiki/Ceramic_water_filter

   A Victorian ceramic water filter. Ceramic water filters (CWF) are an inexpensive and effective type of water filter that rely on the small pore size of ceramic material to filter dirt, debris, and bacteria out of water. This makes them ideal for use in developing countries, [1] and portable ceramic filters are commonly used in backpacking. [2]

5. Gallego calls Biden administration ‘all talk, no action’ on ...

   www.aol.com/gallego-calls-biden-administration...

   Rep. Ruben Gallego (D-Ariz.), the Democratic nominee for Senate in the Grand Canyon State, excoriated the Biden administration Thursday for what he called insufficient federal support on extreme heat.

6. These Are the 8 Best Sports for Weight Loss - AOL

   www.aol.com/lifestyle/8-best-sports-weight-loss...

   Here’s what to keep in mind about sports and weight loss: Some of the best sports for losing weight include running, cycling, swimming, basketball, soccer, golf, brisk walking and weight lifting ...

7. How to watch the 2024 Nathan's Hot Dog Eating Contest - AOL

   www.aol.com/sports/watch-2024-nathans-hot-dog...

   The 2024 Nathan's Hot Dog Eating Contest is nearly here, but missing its marquee star Joey Chestnut. With the 16-time champion out of the event due to a contract dispute, the Nathan's contest will ...