air existing, present of air, wind - air moving (sometimes with considerable pressure) from a place of higher pressure to a location of lower stress; "trees bent beneath the fierce winds"; "when there is no wind, row"; "the radioactivity was remaining swept upwards because of the air existing and https://louispfvkz.bleepblogs.com/36161661/5-simple-techniques-for-dry-air-purge-thermal-chambers