air shaft definition

  • noun:
    • a vertical (or near vertical) shaft that supplies air flow to a tunnel or any other underground facility
    • identical to air-pit.
    • Any ventilating shaft.
    • a shaft for ventilation
    • a vertical (or near vertical) shaft that supplies ventilation to a tunnel or any other underground center
    • just like air-pit.
    • Any ventilating shaft.
    • a shaft for ventilation
  • others:
    • A passage, generally straight, for admitting fresh air into a mine or a tunnel.
    • A passage, often vertical, for admitting outdoors into a mine or a tunnel.

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