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单词
underfrequency relay
释义
underfrequency relay
\ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ ̷ ̷ ̷ ̷-\
noun
Etymology:
under
(III)
+ frequency
:
a relay actuated by a fall in electrical frequency
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更新时间:2025/7/30 0:56:05