... 中垂应力：sagging stress 中垂度：amount of sag 中垂;下降;倾斜;垂弛;垂度;压向下风：sag ...
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Transient power quality issues have been becoming extrusive, such as voltage well, voltage sag and voltage interruption, and bring customers amount of loss.
暂态电能质量问题越来越突出，如电压跌落、骤升、短时断电等现象经常发生，给用户带来了很大的损失。
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