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| 电压转换开关 | |||
| 电压开关 | |||
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voltage switch : 39 phrases in 13 subjects |
| Agriculture | 1 |
| Air defense | 1 |
| Aviation | 1 |
| Dermatology | 1 |
| Electric machinery | 3 |
| Electronics | 6 |
| Exhibitions | 1 |
| Geophysics | 2 |
| Hydroelectric power stations | 2 |
| Information technology | 1 |
| Mathematics | 1 |
| Metallurgy | 3 |
| Technology | 16 |
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