Medical surgical masks must comply with my country's pharmaceutical industry standard number: YY 0469-2011, "Technical Requirements for Medical Surgical Masks". The main technical indicators are as follows:
This time, I will popularize the use and precautions of escape respirator. Escape respirator is collectively referred to as respirator, gas mask, and is also called fire respirator or smoke mask.
With the spread of the new crown pneumonia epidemic around the world, various protective equipment has played a vital role. From medical masks to medical protective clothing to protective masks, it seems that all-round blocking the virus has become an arduous task for most people.
This article introduces the precautions for using KN95 masks
This article introduces the correct use of dust masks
