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| 喷气发动机; 推进发动机 | |||
| 主推进发动机推进发动机 | |||
| propulsion engine: 12 phrases in 5 subjects |
| Automobiles | 2 |
| Aviation | 4 |
| Metallurgy | 1 |
| Nautical | 2 |
| Technology | 3 |
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