air curtain

air curtain
compressed air directed, usually downward, across a doorway so as to form a shield to exclude drafts, insects, etc.

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Universalium. 2010.

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  • air curtain — /ˈɛə kɜtn/ (say air kertn) noun a stream of compressed air directed, usually downwards, across a doorway, to form a shield against draughts, etc …  

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