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noun | adjective | to phrases
underfrequency [ˌʌndə'friːkwənsi, -dər'-] n
gen. 降低的频率; 低于额定的频率
avia. 欠频
oil 低于额定频率
space 频率过低; 降低的频率
underfrequency [ˌʌndə'friːkwənsi, -dər'-] adj.
gen. 低频
underfrequency
: 10 phrases in 4 subjects
Aviation1
Electronics5
Hydroelectric power stations3
Technology1