China was the first in the world to use masks. In ancient times, people in the court began to cover ...
Because medical masks generally need to be sterile, ethylene oxide sterilization is required in orde...
The N95 respirator has a filtration efficiency of more than 95% for particles with an aerodynamic di...
N95 Respirator is one of the 9 kinds of particulate protection masks certified by NIOSH. "N" means n...
Wearing a mask is also very important. Do you know the correct way to wear a mask? Let me tell you. ...
Face masks have a certain filtering effect on the air entering the lungs.
