deep water echo-sounding instrument
... 兰格文回声测深仪 langevin echo sounding machine 旁视回声测深仪 lateral echo sounder 深水回声测深仪 deep water echo-sounding instrument; deep-water echo-sounding instrument ...
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deep water echo-sounding instrument
深水回声测深仪
以上为机器翻译结果，长、整句建议使用 人工翻译 。