| 摘要 |
<p>The surface (10) is formed by depressions (12) for resulting a stable rotational motion of a rotatable rotation medium (16) in the depressions. The rotational motion has a motion component in a contact area (23) associated in a surface plane (11). The motion component is directed in the direction of flow of a flowing fluid (13). An independent claim is also included for a method for reducing the flow resistance of a surface by placing surface planes and depressions.</p> |
