Assertion: brattice | /r/ObjectUse | used in underground mining
Facets:
value: as curtain
type: MANNER
value: as a wall
type: PURPOSE
value: commonly
type: TEMPORAL
Source sentences:
text: Brattices are commonly used in underground mining as a wall or curtain by which a mine tunnel is sealed against the passage of air or other gases primarily though not exclusively for controlling the flow of air for mine ventillation.