| 摘要 |
<p>The device (1) has a filter to filter gas contained in a case (2), and a shell to support a ventilator to generate air flow and extract the gas from the case, where the case has a wall (3) connected to the device in a zone having aeration orifices permitting the passage of the gas from the interior towards the exterior of volume defined by the case. The filter is arranged in contact with the case and the shell, where the shell is engaged with shape of an outer surface of the wall.</p> |
