A surgical mask is used inside the operating room or within other sterile procedure areas to protect the patient environment from contamination. It also protects the clinician from contaminated fluid or debris generated during the procedure. Surgical masks have ties so that they can be adjusted for fit, and are tied over top of a surgical cap or a bouffant cap.
A procedure mask is used for performing patient procedures, or when patients are in isolation to protect them from potential contaminants. Procedure masks are used to protect both patients and staff from the transfer of respiratory secretions, fluids or other debris. Procedure masks are used for generally "respiratory etiquette" to prevent clinicians, patients and visitors from spreading germs by talking, coughing, or sneezing. Procedure masks have ear loops for quick donning, and since they do not slide on the hair, they can be worn without a surgical cap.
Only 3 physical layers Ad says 4 layer mask. Mine are not. I cut the mask to see and there is only 3 layers. Inside layer is a pretty good thickness but there is 3 actual layers of material. Shipping was good. Misleading Product Description Product not as advertised. Masks are 3 ply NOT 4 ply as advertised.
买了回来不知道是不是真货，据说现在假冒伪劣的很多。
怎么融洽同子女的关系?
·不要监控孩子的电话，尊重其隐私权。
·对孩子的朋友要和蔼可亲，但不要同他们过于亲近。不要侵入他（她）的天地。
·不要在他人面前夸奖孩子，这样会使其尴尬。
·不要在他人面前批评或斥责孩子。如果必须要这样做的话，应该在无人的时候。
·母亲在他人面前要注意服饰。母亲的形象不整洁，孩子会感到羞耻。
·如果你的孩子参加学校的演出，他（她）在舞台上时你不要打手势，这样会令他（她）紧张，甚至出错。
·孩子和你一起坐自己家的车出门时，不要把汽车收音机调到你所喜爱的频道。让孩子挑选电台，但可要求他调低音量。
·在子女需要帮助时要给予帮助，但要注意方法。
·子女在一定的阶段就像需要食品一样需要爱抚，但是爱抚要适可而止，不要在公开场合这样做，更不要在朋友面前这样做。
·不要让你的孩子在外人面前表现他的“本事”，如朗诵、唱歌、跳舞或弹钢琴。如果你为他的本领自豪并希望让人家看到，那就对他提出请求。如果父母坚持让他们在外人面前表现本领，有的孩子会感觉自己像马戏团的猴子。
·不要向他的朋友和亲属讲他的怪癖，尤其不要当他的面前。任何孩子都不愿意别人知道自己的隐私。
·不要让他失去对你的信赖。他向你透露的秘密，你不要告诉别人。你一定要完全尊重他的意愿。
·在他面前不要说谎。他看到自己的父母说谎或弄虚作假，就会感觉不好。例如，父母在某人背后说坏话，而当面又装出热情的样子，孩子就会反感。
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A surgical mask is used inside the operating room or within other sterile procedure areas to protect the patient environment from contamination. It also protects the clinician from contaminated fluid or debris generated during the procedure. Surgical masks have ties so that they can be adjusted for fit, and are tied over top of a surgical cap or a bouffant cap.
A procedure mask is used for performing patient procedures, or when patients are in isolation to protect them from potential contaminants. Procedure masks are used to protect both patients and staff from the transfer of respiratory secretions, fluids or other debris. Procedure masks are used for generally "respiratory etiquette" to prevent clinicians, patients and visitors from spreading germs by talking, coughing, or sneezing. Procedure masks have ear loops for quick donning, and since they do not slide on the hair, they can be worn without a surgical cap.
一般人用的不需要消毒 重要的是用的材料 這個只有選有信譽的牌子了。
https://zhuanlan.zhihu.com/p/105113677
我个人觉得我们现在戴的三层口罩只是普通口罩，至少要中间层有粘融层，可以防止细菌病毒进入。可以搜一下我前两天的旧帖：）
假的和劣质口罩接不住水，水一下子就渗出去了。门诊口罩也接不住，因为也没有放溅液体的喷膜。
能防病毒的外科口罩能兜的住水。
N95是Level 3防护等级的。也可以用水测试
https://www.amazon.com/Surgical-Protection-Medical-Disposable-Elastic/dp/B085JP6XPN
Only 3 physical layers Ad says 4 layer mask. Mine are not. I cut the mask to see and there is only 3 layers. Inside layer is a pretty good thickness but there is 3 actual layers of material. Shipping was good. Misleading Product Description Product not as advertised. Masks are 3 ply NOT 4 ply as advertised.
这是最起码的要求了。
是misleading
不带这么忽悠我们啊
你让我们怎么信你的话呢？ 做律师的不就是要先论证再凭事实说话么？
https://www.thomasnet.com/articles/plant-facility-equipment/how-to-make-n95-masks/
为了证明你是对的，拼命找证据，连最初的辩论点都转移了，呵呵 我不奉陪了
BFE (Bacterial Filtration Efficiency)
或者买N95，N90
经过两次去牙医那儿的感觉，戴手套也很重要，真的对你咳嗽的几率很小，但我们开门关门几率大呀。
现在近视眼的比较好了，护目镜我没好意思戴