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Bright Annealing 2

(english) The process of annealing in a protective atmosphere so as to prevent discoloration of the bright surface desired.

Banding

(english) Inhomogeneous distribution of alloying elements or phases aligned in filaments or plates parallel to the direction of working.

Holding Period Period

(Concrete Engineering) In the manufacture of concrete products, the period between completion of casting and the introduction of additional heat or the steam curing period

Recycling

(Environmental Engineering) The recovery and reuse of a product which would otherwise be thrown away.

Biochemical oxygen demand (BOD)

(Environmental Engineering) The amount of oxygen required to oxidize any organic matter present in a water during a specified period of time, usually 5 days. It is an indirect measure of the amount of organic matter present in a water.

Roller support:

(english) In two dimensions, a roller support restrains one translation degree of freedom.

Anaerobic process

(Environmental Engineering) A process which only occurs in the absence of molecular oxygen.

Maximum contaminant level (MCL)

(Environmental Engineering) The maximum allowable concentration of a given constituent in potable water.

Total suspended solids

(Environmental Engineering) (TSS) is the amount of suspended (filterable) matter in a water.

Breakout

(english) An accident caused by the failure of the walls of the hearth of the furnace resulting in liquid iron or slag (or both) flowing uncontrolled out of the blast furnace.

Absolute Volume

(Concrete Engineering) The volume of an ingredient in its solid state, without voids between individual pieces or particles, in the case of fluids, the cubic content occupied. In concrete, the actual volume occupied by the different ingredients determined by dividing the weight of each ingredient pounds, by ifs specific gravity, times the weight of one cubic foot of water in pounds. Example: Absolute Volume of one sack of cement equals: 94 ๗ (3.15X62.4) = 0.478 cubic feet

Ecosystem

(Environmental Engineering) An organism or group of organisms and their surroundings. The boundary of an ecosystem may be arbitrarily chosen to suit the area of interest or study.

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