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ทั้งหมดหรือบางส่วน
(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 anoxic biological conversion of nitrate to nitrogen gas. It occurs naturally in surface waters low in oxygen, and it can be engineered in wastewater treatment systems.
(Concrete Engineering) Deleterious chemical and/or physical re-action between sulfates in ground water or soil and certain constituents in cement, which result in expansion and disruption of the concrete.
(Concrete Engineering) Condition in which concrete, mortar, or cement paste will sustain deformation continuously in any direction without rupture.
(Environmental Engineering) Contamination found in trace (very low) levels.
(Environmental Engineering) Systems which change in response to feedback.
(english) Dirt or other impurities in the steel strip.
(english) In shell molding, resin burned out too soon.
(english) A cutting tool in which the tool bit,the boring bar and in some cases the tool holder are incorporated.
(Environmental Engineering) The amount of molecular oxygen dissolved in water.
(english) A fictitious force used for convenience in visualizing the effects of forces on bodies in motion. For an accelerating body, the inertial force is considered as a body force whose resultant acts at the object's center of gravity in a direction opposite the acceleration. The magnitude of the force is the mass of the object times the magnitude of the acceleration.