| 摘要 |
<p>The door leaf does not have direct rigid connections between the interior primary insulating material (2) and the exterior metal faces of the leaf (1). The material (2) is in one or several panels, each of which is engaged by its edges in an interior metal frame (5). This in turn is connected to the edges of the rigid exterior frame. There is a secondary panel of thermal insulation placed between the interior and exterior frame (14) and between the primary insulation and metal plates (9).</p> |
