inner seat ring
inner seat ring
[石油英汉词典]
inner seat ringn.内座环
是什么意思,inner seat ring的解释,inner seat ring的翻译
[新英汉石油技术词典] inner seat ring
inner seat ring
[石油英汉词典]
inner seat ring是什么意思,inner seat ring的解释,inner seat ring的翻译
[新英汉石油技术词典] inner seat ring