| 摘要 |
<p>The ceiling plate has a lower plate (1) and an upper plate (2) which are perforated and glued on flat strips (7,9). The indentations (8,10) are provided on the bottom portion and upper portion of the plates respectively. The sound-absorbing structure (12) is filled between the plates. A parallel tube (3) is provided for guiding a liquid heat transfer medium. The flat strips (7,9) are mounted with the exchange ports (11) for the exchange of air between the upper lying space and the underlying space of the cover plate.</p> |
