?回声测深仪

... 超声波测深仪（回声测深仪） ultrasonic sounder 回声测深仪 acoustic dapth finder; acoustic depth finder; echo sounder; acoustic sounder; acoustical depth finder; acoustics depth telemeter; acousticsounder; depth recorder; depth recording device; depth-sounding apparatus; echo depth sounder; echo depth sounding sonar; echo meter; echo sounding apparatus; echo sounding machine; echosounding apparatus; echo-sounding gear; echo-sounding instrument; echo-sounding machine; echometer; echoscope; echosounder; esd; fathometer; sonic depth finder; sonic echo depth finder; sonic echo sounder; sonic recorder; sonic sounder; sonic sounding gear; underwater sound gear 测深仪回声测深仪 depth sounder ...