echo-sounding instrument
[新英汉石油技术词典]
echo-sounding instrument回声测深仪
是什么意思,echo-sounding instrument的解释,echo-sounding instrument的翻译
echo-sounding instrument
[新英汉石油技术词典]
echo-sounding instrument是什么意思,echo-sounding instrument的解释,echo-sounding instrument的翻译