[电子] 返波管振荡器 backward wave oscillator tube: 返波振荡管backward-wave oscillator tube: 返波振荡管backward wave oscillator: 反向波振荡器; 返波振荡器; 回波振荡器; 逆波振荡器backward-wave oscillator: 返波管振荡器; 返波振荡器; 回波振荡器bwo backward wave oscillator: 回波振荡器,返波管振荡器下载手机词典可随时随地查词查翻译