gamma ray beam
... gamma radiation 辐射 gamma ray beam 射束 gamma ray holography 射线全息照相术 ...
[物] beam
... beamwidth束另度 beam射束 bearingclearance轴承间隙 ...
核 narrow beam ; Narrow beam condition ; pencil
broad beam ; beam condition
电子 beam current ; beam currnet ; beam-out current
射束是一道粒子或能量的流束,较细的射束(beam)也被称为射线(ray)。