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2. Automated pool cleaner - Wikipedia

   en.wikipedia.org/wiki/Automated_pool_cleaner

   In 1883 John E. Pattison of New Orleans applied for a "Cistern and Tank Cleaner" and the first discovered patent was issued the following year. [1] It swept and scraped the bottom of a cistern or tank and, through a combination of suction and manipulation of the water pressure, was able to separate and remove sediment without removing the water.

3. Culligan - Wikipedia

   en.wikipedia.org/wiki/Culligan

   Culligan International is a United States based global water treatment company with a network of dealers and direct operations in 90 countries with 1,000 dealers; over 600 in North America alone, and more than 14,000 employees.

4. Automated tank cleaning machine - Wikipedia

   en.wikipedia.org/wiki/Automated_tank_cleaning...

   Image depicts Gamajet automated tank cleaning machines Alfa Laval Gamajet machine lowered into a manhole for cleaning. An automated tank cleaning machine is a machine used to clean cargo, process, underground storage tanks and similar equipment such as those found in tank trucks, railroad cars, barges, oil tankers, food and beverage manufacturing facilities, chemical processing plants, ethanol ...

5. 7TP - Wikipedia

   en.wikipedia.org/wiki/7TP

   Comparing to Vickers, the main new features of 7TP were: a better, more reliable and powerful diesel engine, a 37 mm anti-tank gun, thicker armour (17 mm instead of 13 mm on the front), modified ventilation, the Gundlach tank periscope, and a radio. About 132 tanks were produced between 1935 and the outbreak of the war, plus four iron prototypes.

6. In-tank toilet cleaning tablet - Wikipedia

   en.wikipedia.org/wiki/In-tank_toilet_cleaning_tablet

   Many plumbers, manufacturer of toilets, and other professionals discouraged in-tank toilet cleaning products due to major disadvantages. [8] A major complication that may occur includes bleach breaking down rubber gaskets and corroding steel parts. [9] Another issue is the blue dye commonly used in in-tank cleaning tablets may cover up iron ...

7. Robotic vacuum cleaner - Wikipedia

   en.wikipedia.org/wiki/Robotic_vacuum_cleaner

   Robotic vacuum cleaner on a hardwood floor. A robotic vacuum cleaner, sometimes called a robovac or a roomba as a generic trademark, is an autonomous robotic vacuum cleaner which has a limited vacuum floor cleaning system combined with sensors and robotic drives with programmable controllers and cleaning routines.

8. WZ-132 light tank - Wikipedia

   en.wikipedia.org/wiki/WZ-132_Light_Tank

   WZ-132 light tank (simplified Chinese: WZ-132轻型坦克; traditional Chinese: WZ-132輕型坦克) was a Chinese light tank which was developed between the 1960s and 1970s. Its development lasted for more than ten years before it was set aside, ultimately proving too technical to be brought into production.

9. Water purification - Wikipedia

   en.wikipedia.org/wiki/Water_purification

   In 1904, Allen Hazen showed that the efficiency of a sedimentation process was a function of the particle settling velocity, the flow through the tank and the surface area of tank. Sedimentation tanks are typically designed within a range of overflow rates of 0.5 to 1.0 gallons per minute per square foot (or 1250 to 2500 litres per square meter ...