Drape the tubing over your ears. Slide the loop adjustment collar up under the chin to hold the tubing securely in place.
Drape the tubing over your ears. Slide the loop adjustment collar up under the chin to hold the tubing securely in place.
将支管顺着耳轮绕到脖子底下，再将调节圈调到合适的位置，系紧吸氧管。