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(english) A three-roll cluster used to control line tension at strategic locations on the line.
(english) Manual control used to by-pass automatic valve if it fails or in an emergency.
(Environmental Engineering) A functional group with an oxygen atom double bonded to a carbon atom.
(Environmental Engineering) Gas transfer of an undesirable gas from a water stream to the atmosphere.
(Software Engineering) a point in time that is used to indicate progress during a project
(Environmental Engineering) The amount of oxygen required to oxidize any ammonia present in a water.
(english) The tendency of a metal or material to fracture without undergoing appreciable plastic deformation.
(Software Engineering) a modeling activity whose objective is to understand what the customer really wants
(english) Machine located at each delivery reel to automatically place circumference bands around completed coils.
(english) Devices used to remove build up on edge of strip after the slitting process.
(english) Similar to the concept of center of gravity, except that it applies to a two dimensional shape rather than an object. For a given shape, the centroid location corresponds to the center of gravity for a thin flat plate of that shape, made from a homogeneous material.
(Concrete Engineering) 1) Reaction between the products of portland cement (soluble calcium hydroxides), water and carbon dioxide to produce insoluble calcium carbonate (efflorescence). 2) Soft white, chalky surface dusting of freshly placed, unhardened concrete caused by carbon dioxide from unvented heaters or gasoline powered equipment in an enclosed space. 3) Carbonated, dense, impermeable to absorption, top layer of the surface of concrete caused by surface reaction to carbon dioxide. This carbonated layer becomes denser and deeper over a period of time. 4) Reaction with carbon dioxide which produces a slight shrinkage in concrete. Improves chemical stability. Concrete masonry units during manufacturing may be deliberately exposed to carbon dioxide after reaching 80% strength to induce carbonation shrinkage to make the units more dimensionally stable. Future drying shrinkage is reduced by as much as 30%.