| 摘要 |
Fume cupboard consisting of a front wall which can be in particular hinged open and has hollow side rails between which a sash window is provided and in which counterweights for this window are provided, and with interior air ducting means for controlling the amount of air sucked in or blown in from the surroundings with various window openings, and/or consisting of a hollow lower threshold for the sash window, which is suitable, with the window more or less closed, for sucking in air from behind, in particular from the interior of a lower cupboard, in particular a chemical store cupboard. <IMAGE>
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