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| 旋转式磁场放大机; 加速-制动联合机 | |||
| 交磁扩大机; 微场扩流直流发电机; 旋转式磁场放大机 | |||
| 直流放大机 | |||
| 磁场放大机 | |||
| 交磁放大机; 微场扩流发电机 | |||
| metadyne: 4 phrases in 2 subjects |
| Electric machinery | 1 |
| Technology | 3 |
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