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Lüftungsklappe f =, -n
gen.	ventilation damper
airccon.	register (mit Durchflussverstellung)
chem., mech.eng.	ventilation valve
construct.	ventilating damper
mech.eng.	air shutter; air valve
mech.eng., el.	vent valve
mun.plan., mech.eng.	ventilating shutter
tech.	air vent; ventilation flap; damper

Lüftungsklappe: 2 phrases in 2 subjects

Construction	1
Transport	1