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(Concrete Engineering) The shortening of a member in pre-stressed concrete which occurs on the application of forces induced by prestressing.
(english) A device which permits air to move in and out of a container or component to maintain atmospheric pressure.
(english) A closed vessel in which water, is transformed into steam at a given pressure and temperature under controlled conditions.
(Environmental Engineering) An attached growth biological process in which the microbial film is attached to non-moving rock or plastic media.
(Environmental Engineering) In wastewater treatment, the conversion of the suspended, colloidal and dissolved organics remaining after primary treatment into a microbial mass with is then removed in a second sedimentation process. Secondary treatment included both the biological process and the associated sedimentation process.
(Environmental Engineering) The atmosphere from approximately 12 km to 70 km. The temperature of the atmosphere increases in this region.Strong acid
(english) A “tool” or reinforcing part which supports the backer-which, in turn, supports an extruding die against the pressure of extrusion.
(english) Irregular-shaped surface cavities in a casting containing carbonaceous matter. Caused by spilling off of the blacking from the mold surface.
(Software Engineering) an umbrella process that enables a project team to accept, evaluate, and act on changes in a systematic manner
(Environmental Engineering) A process which occurs only at very low levels of molecular oxygen or in the absence of molecular oxygen.
(Software Engineering) a structured meeting conducted by software engineering with the intent of uncovering errors in some deliverable or work product
(english) Tackle used in conjunction with a crane for turning over the cope or drag of a mold prior to assembly.