 |
yexuesongV2EX member #405100, joined on 2019-04-23 15:45:54 +08:00 |
| 「网红式」口罩可以有效防护吗？ 问与答 • yexuesong • Feb 27, 2020 • Lastly replied by yexuesong | 1 |
yexuesong's recent replies
Feb 27, 2020 Replied to a topic by yexuesong › 问与答 › 「网红式」口罩可以有效防护吗？ |
弄错了，限制的是 CDC 清单的链接，Google `NIOSH-Approved Particulate Filtering Facepiece Respirators` 即可
Select Language