air passage

In the secondary system A is a cold-air passage, T a butterfly valve and J a gasoline jet discharging into the cold-air passage.

Each side of each137 flat water cell abuts on an air passage.

So much water can flow out that an air passage is left at a, and the pipe is not sealed.

Even every air passage running through its body shed its parchment lining.

Undercast, un′dėr-kast, n. an air-passage crossing a road in a mine by means of an air-tight box or channel beneath it.