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An inverted arch or invert is a civil engineering structure in the form of an inverted arch, inverted in comparison to the usual arch bridge. Like the flying arch , the inverted arch is not usually used to support a load (with teh exceptions of the foundations of the piers and retaining walls , see below), as for a bridge, but rather to resist ...
The headstand, or sometimes head stand, is a pose that is an inversion posture of standing head down. The technique is used in different settings such as yoga, breakdancing, acrobatics and beginner gymnastics.
Fords may be impassable during high water. A low-water crossing is a low bridge that allows crossing over a river or stream when water is low but may be treated as a ford when the river is high and water covers the crossing. The word ford is both a noun (describing the water crossing itself) and a verb (describing the act of crossing a ford).
A bridge can be categorized by what it is designed to carry, such as trains, pedestrian or road traffic (road bridge), a pipeline (Pipe bridge) or waterway for water transport or barge traffic. An aqueduct is a bridge that carries water, resembling a viaduct, which is a bridge that connects points of equal height.
A low-water crossing (also known as an Irish bridge or Irish Crossing, causeway in Australia, low-level crossing or low-water bridge) is a low-elevation roadway traversing over a waterbody that stays dry above the water when the flow is low, but is designed to get submerged under high-flow conditions such as floods.
Aqueducts must span a crossing at the same level as the watercourses on each end. The word is derived from the Latin aqua ("water") and ducere ("to lead"), [2] therefore meaning "to lead water". A modern version of an aqueduct is a pipeline bridge. They may take the form of tunnels, networks of surface channels and canals, covered clay pipes or ...
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The pose is entered from Sarvangasana (shoulderstand), the chest being held forwards by the hands and the feet lowered to the ground behind the back, the knees remaining bent; or more easily, by lifting the back from lying supine on the ground. The full pose has the knees bent and the ankles caught (Bandha) by the hands. The pose may be exited ...