From WebRef.orgJump to navigationJump to search
- In tunnel timbering, two posts and a roof timber. Nichols, 1
- A transverse structure consisting of legs, bracing, and feet used for the purpose of supporting a gallery or conveyor frame at a fixed elevation.
Source: Dictionary of Mining, Mineral, and Related Terms
Sponsor: Feed your intelligence with original documentaries from CuriosityStream. 30 days free!