油烟

yóu yān qì wèi

油烟气味

smell of soot

jìn xíng yóu yān huí shōu

进行油烟回收

carry out oil fume recovery

dà lóu xū yào pēn shā lái qīng chú hēi sè yóu yān jì

大楼需要喷沙来清除黑色油烟迹。

The building would have to be sandblasted to remove the black soot.