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| 电压波 | |||
| voltage wave: 38 phrases in 11 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Electric machinery | 3 |
| Electricity generation | 1 |
| Electronics | 11 |
| General | 1 |
| Hydroelectric power stations | 1 |
| Information technology | 4 |
| Radio | 2 |
| Technology | 12 |
| Telecommunications | 1 |
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