| 摘要 |
<p>The arrangement structure has ventilation apertures (7) that are provided in rail (8). The cross-sectional U-shaped rail (2) is provided with lateral side legs (4) and located at the bottom of a door leaf (1). The rail is provided with ventilation apertures that are arranged in the space (6) between the side legs transverse to the longitudinal extension of the U-shaped rail. The ventilation openings are placed outside of the legs of the U-shaped rail.</p> |
