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30

2020-06

Is it safer for students to wear N95 masks in PE class?

It's not advisable to wear a mask in PE class As the situation of epidemic prevention and control co...

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Founded in 2007, hanxiu hall is headquartered in Anqing City, Anhui Province. Hanshoutang integrates biotechnology research and development, technical services, medical equipment, ...

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Kn95 respirator kn95 is a standard respirator in China. Kn95 respirator is a kind of respirator with particle filtration efficiency in our country Kn9...