subsurface safety valve
[新英汉石油技术词典]
subsurface safety valve井下安全阀
是什么意思,subsurface safety valve的解释,subsurface safety valve的翻译
[能源英汉词典] subsurface safety valve
subsurface safety valve
[新英汉石油技术词典]
subsurface safety valve是什么意思,subsurface safety valve的解释,subsurface safety valve的翻译
[能源英汉词典] subsurface safety valve