“氦封”概念、定义、翻译-科学时代

单词	氦封
释义	航空航天词汇手册 helium seal 氦封
随便看	camera aperture camera aperture camera assistant camera attachment camera axis camera axis camera bag camera balancing camera base camera bellows camera body camera bombing camera boom camera booth camera-break camera cable camera calibration camera calibration camera car camera car camera-carrying satellite camera case camera chamber camera coverage camera coverage

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。

helium seal