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A jack post (telepost, adjustable steel column) is a steel post used in the construction trades for temporary support of ceilings, walls and trenches ().They are designed to be able to mechanically telescope to about twice their shortest length in order to span a wide variety of spaces.
Samuel Fox invented the steel-ribbed umbrella in 1852; however, the Encyclopédie Méthodique mentions metal ribs at the end of the eighteenth century, and they were also on sale in London during the 1780s. [43] Modern designs usually employ a telescoping steel trunk; new materials such as cotton, plastic film and nylon often replace the ...
Semi-trailer aerodynamic devices are devices affixed to semi-trailers, for the purpose of reducing aerodynamic drag caused by air turbulence. The two major types of device in use are trailer skirts (or side skirts ), affixed to the underside of trailers, and trailer tails (or boat tails , or rear fairings ), affixed to the rear.
The Metro Richmond Zoo in Moseley, Virginia, has announced the name of a female baby pygmy hippo born there on Dec. 9. Drum roll, please... After a public vote, the hippo has been named Poppy, zoo ...
The flu is surging in New York and across the US — and claimed the lives of five kids in the days before Christmas.. Positive tests climbed a whopping 12% for the week ending Dec. 21, according ...
Upon Carter's death at age 100 this past December, the house will be turned into a museum. Carter will be laid to rest on the property. “The Carters loved Plains.
Agricultural equipment is any kind of machinery used on a farm to help with farming.The best-known example of this kind is the tractor.. From left to right: John Deere 7800 tractor with Houle slurry trailer, Case IH combine harvester, New Holland FX 25 forage harvester with corn head.
Telescopic cylinders must only be used in machinery as a device for providing force and travel. Side forces and moment loads must be minimized. Telescopic cylinders should not be used to stabilize a structural component. [4] Hydraulic telescopic cylinders are often limited to a maximum hydraulic pressure of 2000-3000 psi.