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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.
[citation needed] In 1922, Speed Queen was the first company to introduce washers with nickel-copper tubs. The brand name "Speed Queen" was created in 1928. During World War II, it switched production to support the war effort, manufacturing 20 mm shells, and parts for airplanes, tanks and guns.