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ค้นเจอ 438 รายการ

Reversible reaction

(Environmental Engineering) A reaction in which the reactant(s) proceed to product(s), but the products react at an appreciable rate to reform reactant(s).

AB Srews

(english) Sheet metal screws with pointed ends similar to type-A screws and thread dimensions similar to type-B. Type AB screws are seldom used in stainless.

Domain analysis

(Software Engineering) an object-oriented software engineering activity that attempts to identify classes that are relevant to an entire application domain, rather than a specific application

OCL (Object Constraint Language)

(Software Engineering) a supplement to UML, this formal language allows a software engineer to construct unambiguous statements about the characteristics of various design model elements

Irreversible reaction

(Environmental Engineering) A reaction in which the reactant(s) proceed to product(s), but the products react at an appreciable rate to reform reactant(s).

Abrasion 1

(english) The displacement and/or detachment of metallic particles from a surface as a consequence of being exposed to flowing solids, fluids or gases. The process of rubbing, grinding, or wearing away by friction.

Carbonation

(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%.

Batch Oven

(english) Oven use to bake a number of cores at one time.

Bloomery

(english) A primitive furnace used for direct reduction of ore to iron.

Baghouse filter

(Environmental Engineering) A fabric filter device used to remove particulate air pollutants.

Jacking Equipment

(Concrete Engineering) In prestress concrete, the device used to stress the tendons.

Shear stress:

(english) Stress acting parallel to an imaginary plane cut through an object.

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