bell and flange piece
[新英汉石油技术词典]
bell and flange piece承口法兰短管
是什么意思,bell and flange piece的解释,bell and flange piece的翻译
[石油英汉词典] bell and flange piece
bell and flange piece
[新英汉石油技术词典]
bell and flange piece是什么意思,bell and flange piece的解释,bell and flange piece的翻译
[石油英汉词典] bell and flange piece