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模式振荡 : 19 phrases in 11 subjects |
| Air defense | 1 |
| Artificial intelligence | 1 |
| Automobiles | 2 |
| Aviation | 1 |
| Electronics | 2 |
| General | 1 |
| Metallurgy | 3 |
| Oil / petroleum | 1 |
| Plastics | 1 |
| Rail transport | 1 |
| Technology | 5 |
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