| • open working • surface mining | |
| पृष्ठ: page surface face side dorsum insert surface rock | |
| खनन: digging mining excavation mining | |
पृष्ठ खनन अंग्रेज़ी में
[ prstha khanan ]
| • open working • surface mining | |
| पृष्ठ: page surface face side dorsum insert surface rock | |
| खनन: digging mining excavation mining | |
