医用口罩你佩戴得正确吗？第一步先看口罩正反！ 2023/9/18 作者 Johnmin 新冠疫情发展至今，#口罩#已然成为“手机、钱包、钥匙”以外的，出门必备单品。而一次性医用外科口罩，是 … Read more
How to wear a surgical mask to capture viruses? Should the blue side be in or out? 2023/7/242023/6/7 作者 Johnmin Since COVID-19 started, there has been confusion o … Read more
