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单词
directional filter
释义
directional filter
noun
:
an electric filter designed to divide the band of frequencies available for carrier currents about midway using one portion of the band for east-to-west transmission and the other portion for west-to-east transmission
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benzpyrene
benzpyrinium
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benzylic
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be of the opinion
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更新时间:2025/6/25 21:22:32