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Washboarding effect on a road. Washboarding or corrugation [1] is the formation of periodic, transverse ripples in the surface of gravel and dirt roads. Washboarding occurs in dry, granular road material [2] with repeated traffic, traveling at speeds above 8.0 kilometres per hour (5 mph). [3]
Woman on an Israeli kibbutz using a washboard to do laundry. A washboard or a scrubbing-board [1] is a tool designed for hand washing clothing. With mechanized cleaning of clothing becoming more common by the end of the 20th century, the washboard has become better known for its secondary use as a musical instrument.
The spacing of the tool spirals around the drum affect the end surface of the road, with micro-milling having the tightest spacing. [2] The majority of milling machines use an up-cut setup which means that the drum rotates in the direction opposite that of the drive wheel or tracks, (i.e. work surface feeds into the cut). [11]
Washboard may refer to: Washboard (laundry), a tool for washing clothes; Washboard (musical instrument), a percussion instrument; Washboarding, corrugation on gravel ...
Laundry work has traditionally been highly gendered, with the responsibility in most cultures falling to women (formerly known as laundresses or washerwomen). The Industrial Revolution gradually led to mechanized solutions to laundry work, notably the washing machine and later the tumble dryer. Laundry, like cooking and child care, is still ...
Alton Harrell, Francis Buckheit, Daniel Burke, Elizabeth Hunter, Jacquelyn Comiskey, Robert Eccleston, Bunice Knight, Kevin McDonald and Ralph Knowles, were arraigned Thursday in connection to the ...
U.S. President Donald Trump's administration is considering merging the U.S. international aid agency (USAID) into the State Department in a major revamp that would shrink its workforce and align ...
A culvert under the Vistula river levee and a street in Warsaw. Construction or installation at a culvert site generally results in disturbance of the site's soil, stream banks, or stream bed, and can result in the occurrence of unwanted problems such as scour holes or slumping of banks adjacent to the culvert structure.