Noun:

1. the branch of electronics that deals with beams of electrons and their focusing and deflection by magnetic fields

electronholen.电子空穴electronn.电子electron ionization mass spectrometry电子电离质谱分析electron-controlled profile milling电子控制靠模铣electron-beam evaporation equipment电子束蒸发设备electron beam mask-making apparatus电子束制版机electronegativity equalization method电负性均衡法electron microscopy and microanalysis电子显微镜检查和微量分析electron-beam disconnection machine电子束切割机electron beam melting and solidifying电子柬熔凝Electron Trapping in Multipole Magnet多极场的电子云俘获效应研究electron-capture gas chromatography气相电子捕获法