“directional filter”的概念、定义、翻译、参考文献-科学参考

单词	directional filter
释义	directional filter [dǝ`rek·shǝn·ǝl `fil·tǝr] ^ELECTRONICS A low-pass, band-pass, or high-pass filter that separates the bands of frequencies used for transmission in opposite directions in a carrier system. Also known as directional separation filter.
随便看	local derivative local device local distortion local exchange local extra observation local first selector local forecast Local Group local hidden-variable theory local hour angle local immunity local inflow local invariance locality localization localized state localized vector localizer local level local line local loop local lunar time locally arcwise connected topological space locally compact topological space locally connected topological space

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