| 摘要 |
<p>The front of the panel has a continuous sheet of metal (1) while the back of the panel is made up of a number of sheets welded together (5). The centre of the panel has two parallel series of omega sections (2,16) of opposite hand so that they form cross bracing between the two outer panels. All panel sections are welded together by discontinuous line welding. The omega sections are welded back to back at (18), and to one another and to the back plate (5) at the same position (7,20).</p> |
