| 摘要 |
The ventilation unit has an electric motor, the output shaft of which is fitted with a fan having a cup-shaped central body and a number of blades. The central body is defined by a base wall, and by an annular wall from whose outer face the blades extend. And the main characteristic of the present inventive subject matter lies in through windows being formed in the annular wall of the central body to channel out, in use, any condensate formed inside the central body.
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