The occlusion of air in the form of tiny bubbles (generally smaller than 1 mm) during the mixing of concrete […]

In a piping system, a device used to remove air from water, steam, or a refrigerant.

A duct, usually fabricated of metal, fiberglass, or concrete; used to transfer air from one location to another.

The process of drying slowly under ambient conditions of temperature and humidity, as in the natural seasoning of lumber or

An empty space left around the external foundation wall of a building to prevent the earth from lying against it