air duct造句怎麼寫

The last known case was in Britain in 1978 when a university photographer who worked above a lab handling smallpox died after being accidentally exposed to it from the building's air duct system.

Rectify the gap at final connections between air duct and grille / louvre.

Most of the time, air conditioning is done by fat air ducts which gobble both energy and space between floors and ceilings. Here the cooling is done by a cool water system.