external pipe thread_新英汉石油技术词典
external pipe thread
[新英汉石油技术词典]
external pipe thread外管螺纹
是什么意思，external pipe thread的解释，external pipe thread的翻译
外管螺纹
external pipe thread_新英汉石油技术词典external pipe thread
[新英汉石油技术词典]
external pipe thread是什么意思，external pipe thread的解释，external pipe thread的翻译
