排風口

exhaust vent

a row / a line / to set in order / to arrange / to line up / to eliminate / to drain / to push open / platoon / raft / classifier for lines, rows etc

wind / news / style / custom / manner / CL:陣|阵[zhen4],絲|丝[si1]

air vent / drafty place / wind gap (geology) / tuyere (furnace air nozzle) / (fig.) hot trend / fad

mouth / classifier for things with mouths (people, domestic animals, cannons, wells etc) / classifier for bites or mouthfuls