| 摘要 |
<p>The panel of the invention is of the type having a multitude of openings (7) traversing the panel through its large faces. According to the invention, each opening (7) is formed, in the direction of passage of the air, by a hole (70) which is extended by a bowl-shaped cavity (71) emerging into one of the large faces (61) of the panel. <IMAGE></p> |
