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air duct
 
Noun air duct has 1 sense
  1. air passage, air duct, airway - a duct that provides ventilation (as in mines)
    --1 is a kind of duct
    --1 has parts: vent, venthole, vent-hole, blowhole
    --1 has particulars:
     register; snorkel, schnorkel, schnorchel, snorkel breather, breather; upcast; ventilation shaft
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