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| 电压谐波 | |||
| voltage harmonic: 16 phrases in 8 subjects |
| Electric machinery | 6 |
| Electricity generation | 1 |
| Electronics | 2 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Rail transport | 1 |
| Technology | 3 |
| Wind Energy | 1 |
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