Shaft collar and deck (Underground Mine and Shaft Works)
A concrete shaft collar with a 3.6 m by 2.4 m hoisting opening, a steel deck, guide rails in the shaft, a perimeter handrail and a named swing gate at the loading side.
- 格式
- GLB
- 文件大小
- 35 KB
- 三角面
- 644
- 许可
- CC0 1.0