| • countermining device | |
| सुरंग: cave mine tunnel chestnut underpass subway sap | |
| युक्ति: artifice device | |
सुरंग प्रत्युपायरोधी युक्ति अंग्रेज़ी में
[ suramga pratyupayarodhi yukti ]
| • countermining device | |
| सुरंग: cave mine tunnel chestnut underpass subway sap | |
| युक्ति: artifice device | |
