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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.
Window cleaning with a water-fed pole in Shepparton, Australia Chamois and scrim — Chamois is used to loosen and remove dirt, followed by a buffing with scrim or cheesecloth Water and squeegee — Generally, chemicals are added to water, and a device such as a brush or cloth-covered handle is dipped into the resulting solution and used to ...
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.
A nozzle extension is an extension of the nozzle of a reaction/rocket engine. The application of nozzle extensions improves the efficiency of rocket engines in vacuum by increasing the nozzle expansion ratio.
The barber's pole is commonly found outside barber shops. In 1929, psychologist J.P. Guilford informally noted a paradox in the perceived motion of stripes on a rotating barber pole . The barber pole turns in place on its vertical axis, but the stripes appear to move upwards rather than turning with the pole. [ 3 ]
The Vac-u-form, was a toy invented by Eddy Goldfarb and released by Mattel in the 1960s around 1961 with the trademark filed on October 8, 1962. [1] Based on the industrial process of vacuum forming, a rectangular piece of plastic was clamped in a holder and heated over a metal plate. When the plastic was soft, the holder was swung to the other ...
The center tap is grounded and one pole is fed to an overhead wire section, while the other wire is used for another section. Split-phase distribution is used on Amtrak's 60 Hz traction power system in the Northeast Corridor between New York and Boston. Two separate wires are run along the track, the contact wire for the locomotive and an ...
The first proper lightning rod was invented by Father Prokop Diviš, a Czech priest and scientist, who erected a grounded lightning rod in 1754. Diviš's design involved a vertical iron rod topped with a grounded wire, intended to attract lightning strikes and safely conduct them to the ground. [2]
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