 |
| boring holes: 47 phrases in 15 subjects |
| Automated equipment | 13 |
| Construction | 4 |
| Ecology | 1 |
| Forestry | 1 |
| General | 3 |
| Geology | 1 |
| Geophysics | 1 |
| Makarov | 4 |
| Mechanic engineering | 2 |
| Mechanics | 1 |
| Mining | 2 |
| Nanotechnology | 3 |
| Oil / petroleum | 5 |
| Technology | 3 |
| Wood processing | 3 |