这个仪器记录每一个模型在既定时间段产生的电压。
This recorded the voltage that each model made over a period of time.
当网格电压和频率很稳定时，双馈系统工作的很好。
Double feed systems work well if the grid voltage and frequency is very stable.
当网格电压和频率很稳定时，双馈系统工作的很好。
Double feed systems work well if the grid voltage and frequency is very stable.
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