1. First, draw the general outline of the socket cover.
2. Then, draw fine lines on the air outlet cover plate diagonally.
3. Then draw a metal strip on the nose.
4. Then add the masked model to the left in the middle of the mask.
5. Next, draw a hanging rope on the left side of the image.
6. Continue to add lanyards on the right side of the chart.
7. Finally, add an indent along the edge of the mask. "n" means no oil resistance. "95" means that when exposed to a specific number of special test particles, the particle concentration inside the mask is lower than that outside the mask by more than 95%. It can be seen that the stick figure of n95 protective answer mask is very good, and the problem has been solved.