| • deep drilling | |
| गभीर: bathyl deep sea deposit deep seated profunda | |
| प्रवेधन: boring boring head drill drilling | |
गभीर प्रवेधन अंग्रेज़ी में
[ gabhir pravedhan ]
| • deep drilling | |
| गभीर: bathyl deep sea deposit deep seated profunda | |
| प्रवेधन: boring boring head drill drilling | |
