 |
| rare metals: 41 phrases in 15 subjects |
| Automated equipment | 1 |
| Ecology | 1 |
| Electrochemistry | 1 |
| General | 2 |
| Geology | 3 |
| Gold mining | 4 |
| Makarov | 10 |
| Materials science | 1 |
| Metallurgy | 3 |
| Metrology | 1 |
| Mining | 6 |
| Nanotechnology | 3 |
| Oil / petroleum | 1 |
| Technology | 3 |
| Thermal engineering | 1 |