What's the Difference between Surgical Mask and Single-use disposable civilian medical mask to prevent surgical mask
Mar 28, 2020 · Regardless of whether it is a civil mask or a medical surgical mask, there are actually front and back sides. Take the civil mask, for example, the dark color is the front side, the front side should be outward, and there is a metal nose strips on the medical surgical mask. 2. The light side of mask should opposite to the face.
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