用air duct造句子，“air duct”造句

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.

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

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.