echo box回波: echo; return waves共振腔: resonator; resonant cavity行波共振腔: traveling-wave cavity回波共振器: echo resonator; echo-box径向波共振腔: radial wave resonator下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:回波共振腔，即可在微信中查询翻译
