| 摘要 |
<p>A portable building unit comprising an upright having, in cross-section, a first side defining one side of a rectangle having a length (L) and a second side defining an adjacent second side of a rectangle having a breadth (B), the first and second sides being connected together, at one end, at right angles and there being at least one further side which extends between the opposite ends of the first and second sides and which may lie at least partly within said rectangle so long as the cross-section is not rectangular. <IMAGE></p> |
