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| 极磁铁; 直轴磁铁 | |||
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pole magnet : 10 phrases in 7 subjects |
| Automobiles | 1 |
| Electric machinery | 2 |
| Electronics | 1 |
| Information technology | 1 |
| Oil / petroleum | 1 |
| Space | 1 |
| Technology | 3 |
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