air current, existing of air, wind - air relocating (often with appreciable pressure) from a place of higher stress to an area of low force; "trees bent underneath the fierce winds"; "when there isn't a wind, row"; "the radioactivity was remaining swept upwards by the air existing and out https://thermal-shock-testing89000.bcbloggers.com/35256156/semiconductor-equipment-thermal-cycling-for-dummies