The first grayness of dawn filtered through the air-shaft window of the kitchen.
Mr Trotman went down the air-shaft communicating with the other boilers.
The kitchen opened on an air-shaft, and it was used, not only as a kitchen, but as a dining room and living-room.
They live in lodgings and make acquaintance across the air-shaft.
The flame had come through the top of the air-shaft, and had disabled the ventilating fans.
You remember that I told you there was an air-shaft in the middle of the caisson?
There didn't even appear to be a window, though he afterward discovered one opening into an air-shaft.
Inside the big cylinder was a second smaller one, like an air-shaft, five feet in diameter.
In such cases a second well is dug to the right or left, as an air-shaft, which draws off these noxious vapours.
A large four-inch pipe led up the air-shaft and over the sea.