最低有效电必v lowest effective power; LEP 最低谐振频率 lowest resonant frequency 最低可用频率 lowest usable frequency; LUF ..
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lowest natural resonant frequency 最低固有谐振频率
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The lowest resonant frequency of the membrane is about two octaves higher than this frequency.
膜的最低固有频率比这频率约高二倍。
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