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2. Pool skimmer - Wikipedia

   en.wikipedia.org/wiki/Pool_skimmer

   Typically a skimmer draws water from the pool through a rectangular opening in the wall, at the top of the pool, connected through a device installed in one (or more) walls of the pool. The internal parts of the skimmer are accessed from the pool deck through a circular or rectangular cover, approximately one foot in diameter.

3. Swimming pool sanitation - Wikipedia

   en.wikipedia.org/wiki/Swimming_pool_sanitation

   Two distinct and separate methods are employed in the sanitation of a swimming pool. The filtration system removes organic waste on a daily basis by using the sieve baskets inside the skimmer and circulation pump and the sand unit with a backwash facility for easy removal of organic waste from the water circulation.

4. Oil skimmer - Wikipedia

   en.wikipedia.org/wiki/Oil_skimmer

   An oil skimmer is a device that is designed to remove oil floating on a liquid surface. They are commonly used to recover oil from oil spills in water, or in Industrial situations where waters are contaminated with oil. Oil skimmers are designed to remove free floating oil and are not water treatment devices.

5. Protein skimmer - Wikipedia

   en.wikipedia.org/wiki/Protein_skimmer

   Aspirating pump skimmers are the most popular type of skimmer to use recirculating designs although other types of skimmers, such as Beckett skimmers, are also available in recirculating versions. While there is a popular belief among some aquarist that this recirculation increases the dwell or contact time of the generated air bubbles within ...

6. Universal Atomic 4 - Wikipedia

   en.wikipedia.org/wiki/Universal_Atomic_4

   A Universal Atomic 4, installed in a C&C 29 Mark 1 sailboat.. The Universal Atomic 4 is a four-cylinder, gasoline engine produced by the Universal Motor Company between 1949 [1] and 1984 for use as auxiliary power on sailboats. [2]

7. Airstone - Wikipedia

   en.wikipedia.org/wiki/Airstone

   A spherical airstone at the Osaka Aquarium alongside a trio of red stingray pups, Hemitrygon akajei. An airstone, also called an aquarium bubbler, is a piece of aquarium furniture, traditionally a piece of limewood or porous stone, whose purpose is to gradually diffuse air into the tank, eliminating the noise and large bubbles of conventional air filtration systems, and providing other ...