 |
| hardening strain: 69 phrases in 18 subjects |
| Aluminium industry | 2 |
| Astronautics | 1 |
| Automated equipment | 4 |
| Automobiles | 2 |
| Bridge construction | 1 |
| Construction | 12 |
| Dental implantology | 4 |
| Electronics | 1 |
| Makarov | 5 |
| Materials science | 3 |
| Mathematics | 1 |
| Mechanics | 1 |
| Metallurgy | 7 |
| Nautical | 4 |
| Physics | 3 |
| Seismology | 4 |
| Technology | 13 |
| Transport | 1 |