| 摘要 |
<p>Corner angle system comprises a first side element (16) having a flared flange (34) which is formed with a locking nub (42) facing an insertion section (20) and a second side element (18) lying on a longitudinal edge with a locking recess (46). The nub fits the recess when the side elements are joined. Preferred Features: The side elements have the same wall thickness and the bevels of the side elements have different depths so that the sum of the depths equals the wall thickness of the side elements.</p> |
