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在各种电能质量问题中，电压跌落是危害最严重的动态电能质量问题。
In various power quality problems voltage sags are the worst dynamic power quality problems.
youdao
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在各种电能质量问题中，电压跌落是危害最严重的动态电能质量问题。
In various power quality problems voltage sags are the worst dynamic power quality problems.
youdao