Ratings, and Filtration Effectiveness". Smart Air Filters. "YY 0469-2011 医用外科口罩.pdf". max.book118.com. "YY/T 0969-2013: PDF in English". chinesestandard... 223 KB (23,706 words) - 16:46, 2 May 2024 |
Filters. 中华人民共和国医药行业标准:YY 0469–2011 医用外科口罩 (Surgical mask) (in Chinese) 中华人民共和国医药行业标准:YY/T 0969–2013 一次性使用医用口罩 (Single-use medical face mask) Archived... 14 KB (1,373 words) - 23:11, 16 February 2024 |