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| 继电保护中的频偏闭锁; 频率漂移阻塞 | |||
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frequency-shift blocking : 6 phrases, 3 sujets |
| Communications | 2 |
| Technologie | 2 |
| Transport ferroviaire | 2 |
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| |||
| 继电保护中的频偏闭锁; 频率漂移阻塞 | |||
|
frequency-shift blocking : 6 phrases, 3 sujets |
| Communications | 2 |
| Technologie | 2 |
| Transport ferroviaire | 2 |