In most cases, a blown vein is not a dangerous condition and is, in fact, harmless. However, when a vein blows, it needs to be treated immediately, and the vein should not be used until it heals completely. If you have a blown vein and some medical action still needs to be done, ...
For example, a medical mask is composed of a three-layer structure with non-woven fabric (NWF), melt-blown fabric (MBF), and non-woven fabric (NWF), whose basic component is a special polypropylene [8]. Recently, the global production of disposable medical masks has increased sharply world...