| 摘要 |
The device ( 1 ) comprises a support structure ( 2 ) in which at least a first opening ( 8, 9 ) is defined, a shutter ( 13 ) which is mounted for piloting in that structure ( 2 ) and which is adapted to take up a least a first and a second angular position, in which it closes and opens at least partially the first opening ( 8, 9 ) of the structure ( 2 ), respectively, and an actuator device ( 25 ) which is capable of bringing about a controlled angular movement of the shutter ( 13 ) relative to the support structure ( 2 ).
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