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Terms for subject Hydroelectric power stations containing 频率保护 | all forms | in specified order only
| Chinese | English |
| 低频率保护 | underfrequency protection |
| 发电机频率异常保护 | overfrequency/underfrequency protection |
| 频率保护 | frequency protection |
| 高频率保护 | overfrequency protection |