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| 工业频率; 市电频率; 系统频率; 电网频率; 电源频率 | |||
| 线频率; 工频; 网络频率 | |||
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| 电源频率 (электропитания) | |||
| частота сети: 3 phrases in 2 subjects |
| General | 1 |
| Technology | 2 |
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