“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	angle scale angle search system angle section angle sensor angle shark angle shot mortar angle shot mortar test angle shot mortar test angle similarity anglesite angle straggling angle straggling angle T angle-table angle tear test angle tracking angle tracking error angle tracking system angle transducer angle valve angle variable angle variable angle wing angleworm Anglian

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