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