| 摘要 |
<p>The duct (10) has a wall (12) provided with inner and outer sides (14, 16), where a retaining element (20) is formed at the outer side. An inner volume (18) is provided for flowing with gas i.e. air, and is provided with quadratic, rectangular, circular or oval-shaped cross-sectional profile. The inner volume sectionally has a coating of anti-microbial material and/or electrically conductive material that is metallic material or electrically conductive plastic or electrically conductive plastic compound. The wall and the retaining element are made of polymer foam material.</p> |
