A partition, typically of lumber or fabric, erected in a mine for air flow.
A breastwork erected during a siege.
A wooden partition in a coal mine
A wall of split in a shaft or gallery used for ventilation.
Planking to aid a roof or wall.
In mining, a board, plank, or stone liner or partition in a level of shaft, usually made to form an air-passage or limit current of atmosphere to a particular route. Additionally written brettice, brettis.
a partition (often temporary) of planks or fabric which is used to control ventilation in a mine