[光] 调制射束显微密度计 modulated beam: 已调束流microdensitometer: 侧微密度计; 测微光度计; 测微密度计; 微光密度计; 微量光密度计; 微显象测密计; 微型光密度计; 显微光度计density-modulated beam: 密度调制光束frequency modulated beam: 调频光速frequency-modulated beam: 调频电子束下载手机词典可随时随地查词查翻译