Drift cross junction (Underground Mine and Shaft Works)
A 4 m flat backed four way intersection with arched drift openings on every side, four steel corner columns, a ring beam grid and roof bolts.
- 格式
- GLB
- 文件大小
- 50 KB
- 三角面
- 1,008
- 许可
- CC0 1.0
A 4 m flat backed four way intersection with arched drift openings on every side, four steel corner columns, a ring beam grid and roof bolts.