| 摘要 |
This apparatus comprises a ventilator/aerator which is constructed so as to be capable of being placed in the room to be aerated. According to the invention, it is characterised in that it comprises a sensor (10) which serves to detect, in the ambient air, the presence of the harmful substances contained in the smoke of the tobacco, this sensor (10) being operationally connected to the drive motor (11) of the ventilator/aerator for the purpose of activating it when a predetermined threshold is crossed. <IMAGE>
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