|
disk spring : 24 phrases in 13 subjects |
| Automated equipment | 8 |
| Chemistry | 1 |
| Construction | 1 |
| Electric machinery | 1 |
| Electronics | 1 |
| Machinery and mechanisms | 1 |
| Mechanics | 1 |
| Military | 1 |
| Oil / petroleum | 1 |
| Oil and gas technology | 1 |
| Oilfields | 1 |
| Technology | 3 |
| Transport | 3 |