VSII
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VSII — abbr. very seriously ill or injured … Dictionary of abbreviations
very seriously ill or injured — The casualty status of a person whose illness or injury is classified by medical authority to be of such severity that life is imminently endangered. Also called VSII. See also casualty status … Military dictionary
Solar chimney — This article refers to a device for ventilation. For the power generation technology, see Solar updraft tower. A solar chimney often referred to as a thermal chimney is a way of improving the natural ventilation of buildings by using convection… … Wikipedia