vent
fissure
ventilation
venting
https://source.unsplash.com/featured/?vent#.png
/suto3/google.iconvent
/suto3/Google画像検索.iconvent
/suto3/Google定義検索.icon vent
/suto3/wikipedia.iconvent
/suto3/weblio.icon vent
/suto3/kotobank.icon vent
/suto3/jisho.icon vent