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| 专业经营 | |||
| 特殊工况 | |||
| 特别经营 | |||
| 特别行动 | |||
| special operation: 36 phrases in 13 subjects |
| Air defense | 3 |
| Aviation | 8 |
| China | 4 |
| Desert science | 1 |
| General | 1 |
| Hydroelectric power stations | 2 |
| Nautical | 2 |
| Oil and gas technology | 1 |
| Rail transport | 1 |
| Space | 3 |
| Technology | 3 |
| United Nations | 2 |
| United States | 5 |