The present invention concerns a ventilation valve (10), comprising a first louvre component (18a) and a second louvre component (18b).
At least the second louvre component (18b) of the ventilation valve (10) can be moved linearly for diminishing or enlarging the flow gap (A2).
A ventilating valve is arranged on the trolley air inlet pipe (41) to control the on or off state of the trolley air inlet pipe (41).
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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