口罩的分类有哪几种？


#1 Surgical mask 
医用外科口罩
It usually has three layers. It is a basic defense against some viruses.
医用外科口罩通常有三层，能基本防御某些病毒。
 
#2 N95 mask/respirator 
N95型口罩
It is a safety device that covers the nose and mouth and helps protect the wearer from breathing in some hazardous substances. It is designed to filter out at least 95% of the dust and mold in the air.
N95型口罩是一种保护鼻子和嘴巴的安全口罩，有助于保护佩戴者，防止吸入一些有害物质。它能过滤掉空气中至少95%的灰尘和霉菌。
 
#3 Cold weather face mask 
保暖口罩
It can protect you from cold and wind. It is usually made of wind-breaking material like nylon blends. But it doesn’t help much in the context of virus.
保暖口罩可以在寒冷和大风的天气里保护你，通常是由防风材料如尼龙混合物制成。但是在病毒环境下，它没有多大帮助。
 
#4 Activated carbon mask
活性炭口罩
Mask with a charcoal filter cuts out odours effectively making it ideal for general purpose, especially suitable for use across various industries such as engineering, manufacturing, pharmaceuticaland many more.
带有活性炭的口罩可以有效去除异味，非常适用于一般用途，尤其适用于工程、制造、制药等行业。
你分清这几种口罩了吗？