recording echo sounder的意思|示意

自记回声测深仪 ... 自记记录测高计：recording altimeter 自记回声测深仪：recording echo sounder 自记高温计：recording pyrometer ...

自记式回声测深仪 ... 自记式流量表：recording flowmeter 自记式回声测深仪：recording echo sounder 自记式伏特计：recording voltmenter ...

记录式回声测深仪 ... upward-looking echo sounder 上视回声探测仪... recording echo sounder 记录式回声测深仪... supersonic echo sounder 超声波回声测深仪...