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| 电机效率 | |||
| 电效率 | |||
| 电机效率 | |||
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| 电机效率 | |||
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electrical efficiency : 6 phrases in 6 subjects |
| Chemistry | 1 |
| Electric machinery | 1 |
| Electronics | 1 |
| Metallurgy | 1 |
| Space | 1 |
| Wind Energy | 1 |
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