 |
|
Protective System : 77 phrases in 16 subjects |
| Aviation | 1 |
| China | 1 |
| Commerce | 1 |
| Cryptography | 1 |
| Electric machinery | 11 |
| Electricity | 2 |
| Electronics | 7 |
| International trade | 1 |
| Metallurgy | 1 |
| Nautical | 2 |
| Navigation | 1 |
| Rail transport | 1 |
| Space | 9 |
| Technology | 34 |
| Telecommunications | 1 |
| Textile industry | 3 |