| 摘要 |
<p>The invention pertains to an opening skylight of great stability, more particularly of the type consisting of a fixed casing and of an opening part, the latter being itself made up of a frame and at least of one cupola, generally of transparent plastic material. The frame of the opening part comprises the combination of a first frame made up of tubular elements and of a second frame which is supported on the first one and cooperates with the latter for the attachment of the cupola or cupolas.</p> |
