| 摘要 |
<p>The ventilation opening is for incorporation between the upper side of a window frame and the adjacent building structure and comprises a housing (3) with upper and lowre walls (2,1), outside and inside openings (5,6), between which a ventilation through passage (4) extends. The housing at both ends is closed by end pieces (13). A head partition (15) is provided, which uninterruptedly extends over the housing and the end pieces. The upper wall of the housing has a longitudinal cavity (18), on which a corresponding ledge (17) is connected, which is hooked into the longitudinal cavity.</p> |
