half supporting ring
[新英汉石油技术词典]
half supporting ring半支持环,对开支持环
是什么意思,half supporting ring的解释,half supporting ring的翻译
[石油英汉词典] half supporting ring
half supporting ring
[新英汉石油技术词典]
half supporting ring是什么意思,half supporting ring的解释,half supporting ring的翻译
[石油英汉词典] half supporting ring