narrow beam是什么意思

中文翻译窄射束，窄束

网络释义

1)narrow beam,窄射束，窄束2)Narrow beam condition,窄射束3)narrow-beam,窄束4)wavebeam,折射窄波束5)thin beam X-ray imaging,窄束X射线成像6)contracted waterway,河道束窄