| • caving system | |
| गुहायन: caving falling in | |
| पद्धति: method road line procedure scheme approach system | |
गुहायन पद्धति अंग्रेज़ी में
[ guhayan padhati ]
| • caving system | |
| गुहायन: caving falling in | |
| पद्धति: method road line procedure scheme approach system | |
