seal protector ring
[新英汉石油技术词典]
seal protector ring密封防护垫环,密封防护圈
是什么意思,seal protector ring的解释,seal protector ring的翻译
[石油英汉词典] seal protector ring
seal protector ring
[新英汉石油技术词典]
seal protector ring是什么意思,seal protector ring的解释,seal protector ring的翻译
[石油英汉词典] seal protector ring