| 摘要 |
<p>An earmuff (10) has a sealing ring (20) with an outer liquid layer (38) and a foamed plastics layer (36) thereinunder. The liquid layer is arranged as a separate, annular, sheath-equipped liquid ring (38) the sheath (40) of which can move freely relative the sheath (30,32) of the sealing ring (20).</p> |
