That is the goal of the visual feedback system, refining the length of the eye to attain maximum efficiency.

这就是视力反馈系统的目的。改进视力的长度，达到最佳效果。

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Adopt IGBT frequency conversion of German Siemens and voltage feedback series resonance circuit. The conversion efficiency is reaching up to above 97.5%.

采用德国西门子IGBT变频，电压反馈串联谐振电路。变换效率高达97.5%以上。

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Efficiency supervising has the functions of monitoring, guaranteeing, preventing and feedback.

效能监察对企业具有监察、保证、预防、反馈作用。

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The researchers tweaked feedback flow control in subsequent tests, which increased the efficiency to more than 99%.

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