| 1. | Measurement at each additional frequency voltage combination
每一额外频率电压组合的测量 |
| 2. | Voltage measurement at each additional frequency voltage combination
每一额外频率电压组合的电压测量。 |
| 3. | Calibration of precision ac voltmeter at one frequency voltage combination by ac - dc transfer
以交直流转换方法按一频率电压组合校正精密交流电压计 |
| 4. | Calibration at each additional frequency voltage combination by ac - dc transfer , for the same equipment
以交直流转换方法按每一额外频率电压组合校正同一仪器 |
| 5. | Improvement of the breaker hydraulic mechanism of sf6 totally - enclosed high - voltage combination electrical apparatus
6全封闭高压组合电器断路器液压机构改进 |
