Air Curtain

A method of containing oil spills. Air bubbling through a perforated pipe causes an upward water flow that slows the spread of oil. It can also be used to stop fish from entering polluted water.
Found on http://www.epa.gov/OCEPAterms/

air curtain

A buffer zone of air between rooms of different temperatures in a warehouse or between the inside and outside of a store.
Found on http://www.encyclo.co.uk/local/20108
No exact match found