ventilating grille
/ˈvɛntɪlˌeɪtɪŋ ˈɡɹɪl/
n
English · ventilating grille中文 · 排气格栅Español · rejilla del ventiladorFrançais · grille de ventilation
意味：Perforated panel through which aspirated air, cleansed of dust and dirt, is expelled.