| 摘要 |
<p>A ring-type support area (1) with inner and outer contours and a bearing surface for support on a base forms a bearing surface (4) regarding its thickness so as to rest on a base and, on the periphery of the ring-type support area, it forms an undulating neck-support/neck-rest surface (5) with a clearance from the base and with undulating sections (6).</p> |
