| air duct | 3.82 | ...a big air duct in the ceiling. | ||
| tear duct | 1.38 | His tear ducts are a big reason. | ||
| ventilation duct | 1.12 | Clean the ventilation ducts to remove dust and insect debris. | ||
| milk duct | 0.92 | Nearly all breast cancers start in the milk ducts. | ||
| exhaust duct | 0.26 | An exhaust duct was installed to draw out dust and fumes from power machinery. | ||
| hot-air duct | 0.26 | Q. The hot-air ducts in my basement are very close to the ceiling, and some are close together. |