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| 电推进系统 | |||
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| 电力驱动系统 | |||
| 电力推进系统 | |||
| 电推进系统 | |||
| 电火箭发动机 | |||
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electric propulsions system : 7 phrases in 4 subjects |
| Electronics | 1 |
| Nautical | 2 |
| Space | 3 |
| Technology | 1 |
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