 |
| 操作 码: 90 phrases in 17 subjects |
| Air defense | 1 |
| Audio electronics | 1 |
| Automobiles | 1 |
| Aviation | 3 |
| Construction | 1 |
| Cryptography | 1 |
| Electronics | 11 |
| Exhibitions | 2 |
| Geophysics | 1 |
| Information technology | 10 |
| Logistics | 3 |
| Metallurgy | 2 |
| Project management | 1 |
| Securities | 1 |
| Space | 9 |
| Technology | 36 |
| Telecommunications | 6 |