“ultra low penetration air--ultra low penetration air (ULPA)”概念、定义、翻译-科学时代

单词	ultra low penetration air--ultra low penetration air (ULPA)
释义	市政工程词汇手册 ultra low penetration air (ULPA) 超低穿透率空气
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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。

ultra low penetration air (ULPA)