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指示图 : 45 phrases in 18 subjects |
| Agriculture | 1 |
| Air defense | 2 |
| Architecture | 1 |
| Automobiles | 1 |
| Aviation | 6 |
| Business | 1 |
| Commerce | 1 |
| Construction | 1 |
| Electronics | 2 |
| General | 3 |
| Management | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Project management | 2 |
| Shipbuilding | 1 |
| Space | 2 |
| Technology | 17 |
| Telecommunications | 1 |
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