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| 交流转换开关 | |||
| AC switch: 9 phrases in 8 subjects |
| Automobiles | 1 |
| Electric machinery | 1 |
| Electronics | 1 |
| Metallurgy | 1 |
| Rail transport | 1 |
| Shipbuilding | 2 |
| Technology | 1 |
| Wind Energy | 1 |
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