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单词
beam antenna
释义
beam antenna
[`bēm an`ten·ǝ]
ELECTROMAGNETISM
An antenna that concentrates its radiation into a narrow beam in a definite direction.
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EDTA
EDTC
educational age
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eel grass
EELS
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eff
effective address
effective air path
effective ampere
effective angle of attack
effective antenna length
effective aperture
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