 |
| engineering model: 44 phrases in 13 subjects |
| Astronautics | 3 |
| Aviation | 3 |
| Construction | 1 |
| Energy industry | 2 |
| Hobbies and pastimes | 1 |
| Military | 16 |
| Nuclear and fusion power | 1 |
| Power system protection | 2 |
| Programming | 7 |
| Software | 3 |
| Technology | 3 |
| Tribology | 1 |
| Weapons of mass destruction | 1 |