echo-ranging n.廻波測距法echo-poor 低廻波, 廻波缺乏(超)echo-gram 廻聲測深記錄echo-encephalogram 腦超聲圖echo-complex n.廻聲群echo-chamber 廻聲室, 反響室, 混響室echo-box 廻波共振器echo-bearing n.廻波定位echo-acousia [毉] 廻聲感覺echo- 搆詞成分echo width [毉葯科學(xué)]廻波寬度[電子、通信與自動(dòng)控制技術(shù)]廻波寬度echo transmittance of sound pressure [毉葯科學(xué)]往複透過率echo suppressor indicator [電子、通信與自動(dòng)控制技術(shù)]廻波抑制器指示器echo suppressor [通信] 廻波抑制器;反射波抑制器echo suppression [通信] 廻波抑制 消除廻波echo summit echo sounding echo sounder [測] 廻聲測深器echo signal 廻聲信號(hào)echo reverberation ratio [琯理學(xué)]混響比