electron gas电子气electronn.电子electron-beam film scanning胶片电子束扫描录像electron-trapping materials电子俘获材料electron density distribution电子密度分布electron beam photo-etching电子束光刻electron-optical transistor[电] 电子学晶体管electron production treatment电子产品electron microscope technique电子显微技术electron phalanx transmission[电] 电子阵营传递electronstatic viscous filter静电油过滤器, 静电粘液过滤器electron gun convergenc ratio电子枪会聚比