| 摘要 |
<p>Support hoop (10) comprises a circular region (14) having a first end formed as one piece with a straight region (12). The transition between the first end of the circular region and the straight region is bent. A second end of the circular region is clamped, locked and/or bonded to the straight region. Preferred Features: The support hoop is bent from steel band in one piece. Openings (18, 20) for fixing devices are provide in the circular region.</p> |
