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  2. Kärcher - Wikipedia

    en.wikipedia.org/wiki/Kärcher

    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.

  3. Pressure washing - Wikipedia

    en.wikipedia.org/wiki/Pressure_washing

    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.

  4. Space Needle - Wikipedia

    en.wikipedia.org/wiki/Space_Needle

    In May 2008, the Space Needle received its first professional deep cleaning since the opening of the 1962 World's Fair. The monument was pressure washed by Kärcher [40] with water at a pressure of almost 2,611 psi (18,000 kPa) and a temperature of approximately 194 °F (90 °C). The cleaning was only done at night so that the Space Needle ...

  5. Ultrasonic cleaning - Wikipedia

    en.wikipedia.org/wiki/Ultrasonic_cleaning

    Ultrasonic cleaning is a process that uses ultrasound (usually from 20 to 40 kHz) to agitate a fluid, with a cleaning effect. Ultrasonic cleaners come in a variety of sizes, from small desktop units with an internal volume of less than 0.5 litres (0.13 US gal), to large industrial units with volumes approaching 1,000 litres (260 US gal).

  6. Mount Rushmore - Wikipedia

    en.wikipedia.org/wiki/Mount_Rushmore

    This is an accepted version of this page This is the latest accepted revision, reviewed on 22 January 2025. Mountain in South Dakota with sculptures of four U.S. presidents For the band, see Mount Rushmore (band). Mount Rushmore National Memorial Shrine of Democracy Tȟuŋkášila Šákpe Mount Rushmore features Gutzon Borglum's sculpted heads of George Washington, Thomas Jefferson, Theodore ...

  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.