“pencil beam”的概念、定义、翻译、参考文献-科学参考

单词	pencil beam
释义	pencil beam [`pen·sǝl ´bēm] ^{ELECTROMAGNETISM} A beam of radiant energy concentrated in an approximately conical or cylindrical portion of space of relatively small diameter; this type of beam is used for many revolving navigational lights and radar beams.
随便看	corduroy cordwood cordwood module cordylite core core analysis core array core bank core barrel core-barrel rod core binder core bit core blower core box core catcher core-catcher case core cutterhead cored ammonium nitrate dynamite cored bar cored electrode core drier core drill cored solder core-dump core flow

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