“backup ring”概念、定义、翻译-科学时代

单词	backup ring
释义	工程与技术词汇手册 backup ring 备用垫圈；支承环
随便看	burbling burbling cavitation burbot Burda，al- burden burden burden burden burden burden burden burden apportionment burden calculation burden carrier burden cost burden descent burdening burden material burden of armament burden of defense burden of persuasion burden of producing evidence burden of proof burden of proof burden of proof

科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。

backup ring