| 摘要 |
<p>The fitness device for strengthening face muscles solves the problem of developing wrinkles with age. The enclosure of the metal part of the mouthpiece (1) is covered with leather, which makes it easily held in the mouth, while its flat, thin shape prevents it from slipping out of the mouth. The main feature of the device for strengthening face muscles is a weight (3) in the shape of a metal lamella. The weight (3) mass is exactly 0.058 kg.</p> |
