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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Ventilation shaft 6 letters:

UPTAKE: Ventilating shaft
UPCAST: Ventilating shaft in a mine
AIRWAY: Ventilation shaft
AIRWELLS: Ventilation shafts
AIRWELL: Ventilating shaft
UPTAKES: Ventilating shafts.
DUCT: Ventilation shaft