| 摘要 |
<p>The ear protection device (1) has an elastic flexible holder and an earplug arranged at the free ends of the holder. An area is formed as chin area (2a) and another area is formed as cheek area (2b). The cheek area has a length such that a middle line of the chin area extends by a parallel line. The parallel line is guided by a saturation point of an axis of rotation (3') through the holder.</p> |
