| 摘要 |
<p>An arch-frame section (10) comprising a fascia member (20), a soffit member (35), and a bead (38), characterised in that one of the said members (35) is formed integrally with the bead (38) by perforating a metal strip such as to provide first, second and third regions (31, 32, 33) alongside one another, the first region (31) being perforated to provide said one member (35) and a there-adjacent edge portion (36) of the bead (38), the second region (32) being imperforate to provide a smooth surfaced nose portion (37) of the bead (38), and the third region (33) being perforated to provide said bead (38) with an opposite edge portion (39) adjacent the other said member (20).</p> |
