progressive wave tubetraveling-wave tubetravelling wave valvetravelling-wave pipetravelling-wave tubetravellingwavetubetravellingwavevalvetwt traveling wave tubetwt travelling wave tube行: go波管: wave ductm 型行波管: m type twtm型行波管: m type twt【无线电】行波管。: traveling-wave tube; travelling-wave tube下载手机词典可随时随地查词查翻译