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A pressure washer is used to remove old paint from a boat. Patio flagstones being pressure washed using a rotary nozzle. Pressure washing or power washing is the use of high-pressure water spray to remove loose paint, mold, grime, dust, mud, and dirt from surfaces and objects such as buildings, vehicles and concrete surfaces.
In 1950, the cleaning technology division was established with the development of the first European hot water high-pressure cleaner, the DS 350. [11] From the mid-1950s to the 1970s, the production of steam generators for industry and construction was a key focus for the company, while cleaning technology only later became Kärcher's main revenue-generating sector.
Investigation for a large pressure tunnel was begun in 1914, to assist the trunk mains between Potts Hill and Crown Street. The tunnel was to extend from Potts Hill Reservoir to the Waterloo pumping station, approximately 16 kilometres. To allow for maintenance and cleaning, it was designed as two cylindrical tubes, each 1.8 metres in diameter.
When a nozzle is used for cleaning, the impact or pressure is called impingement. As with all spray patterns, the unit impact decreases as the distance from the nozzle increases, thereby increasing the impact area size. The spray impact, , depends on the volumetric flowrate Q and pressure drop according to the equation below. The nozzle type ...
Washer pitching is a game, similar to horseshoes, that involves teams of players taking turns to throw washers towards a box or hole. The game has many variations, and may be called washer pitching, washer toss, washers, huachas or washoes (which is based on the similarity to horseshoes).
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