| • overburden drilling | |
| उपरिभार: overage burden overburden overage | |
| प्रवेधन: boring boring head drill drilling | |
उपरिभार प्रवेधन अंग्रेज़ी में
[ uparibhar pravedhan ]
| • overburden drilling | |
| उपरिभार: overage burden overburden overage | |
| प्रवेधन: boring boring head drill drilling | |
