Common Surgical Masks are mainly composed of three layers of non-woven fabrics. The inner layer is a common non-woven fabric; The outer layer is waterproof non-woven fabric, which is mainly used to isolate the liquid ejected by patients. The filter
Common Surgical Masks are mainly composed of three layers of non-woven fabrics. The inner layer is a common non-woven fabric; The outer layer is waterproof non-woven fabric, which is mainly used to isolate the liquid ejected by patients. The filter
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