airshaft ( synonym found)
Definition of airshaft:

°A vertical opening running from a courtyard to the sky, thus allowing air to circulate to high-rise apartments or offices.
°A device used for handling winding reels in the processing of web-fed materials, such as in continuous-process printing presses.
Definition of airshaft:

°A vertical opening running from a courtyard to the sky, thus allowing air to circulate to high-rise apartments or offices.
°A device used for handling winding reels in the processing of web-fed materials, such as in continuous-process printing presses.
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