Timbered drift set section (Underground Mine and Shaft Works)
A 4 m drift section supported by four three-piece timber square sets with capping plates, angle braces and timber lagging packed against the back.
- 格式
- GLB
- 文件大小
- 43 KB
- 三角面
- 856
- 许可
- CC0 1.0
A 4 m drift section supported by four three-piece timber square sets with capping plates, angle braces and timber lagging packed against the back.