a narrow beam of light or radiation; spec. a beam (typically of approximately circular cross-section) in which the individual rays (or paths of…
单词 | θ197918 |
释义 | society > communication > telecommunication > radio communications > [noun] > other methods or operations > radar > beam (1) pencil beam1902 a narrow beam of light or radiation; spec. a beam (typically of approximately circular cross-section) in which the individual rays (or paths of… |
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