| 摘要 |
<p>The access panel (1) has a cover frame (4) in which an acoustic insulation board (2) is fitted. A fixing device (3) is incorporated in the insulation board. The access panel has a positive and irreversible connection between the insulation board and the cover frame. At least one blow is applied to incorporate the fixing device, which may be a nail, a pin, a staple or a part of the cover frame itself.</p> |
