What is household oxygen concentrator?

What is the medical oxygen concentrator?

Masks can be divided into two categories: medical/non-medical.

Civil masks are allowed to have an exhalation valve. The exhalation valve can reduce the exhalation resistance, which is beneficial for the operator to work for a long time.

Although we have developed a good habit of wearing masks during the epidemic, but as the temperature continues to increase, wearing masks has become more and more uncomfortable, so many people can’t wait to take off the masks and go out unscrupulously. Breathe fresh air. Remind everyone: Don’t ru......

First of all we have to understand, why does the skin like oil? In fact, because your skin is relatively dry, the body secretes a lot of oil in order to lubricate the skin. Of course, this is also related to personal physique, people with large pores prefer oily skin. So what we do is not to remove ......